diff --git a/config/defaults.ts b/config/defaults.ts
index c454863a..a09e916f 100644
--- a/config/defaults.ts
+++ b/config/defaults.ts
@@ -3,6 +3,39 @@ export interface WindowSizeConfig {
   height: number;
 }
 
+export interface DefaultConfig {
+  'window-size': {
+    width: number;
+    height: number;
+  }
+  'window-maximized': boolean;
+  'window-position': {
+    x: number;
+    y: number;
+  }
+  url: string;
+  options: {
+    tray: boolean;
+    appVisible: boolean;
+    autoUpdates: boolean;
+    alwaysOnTop: boolean;
+    hideMenu: boolean;
+    hideMenuWarned: boolean;
+    startAtLogin: boolean;
+    disableHardwareAcceleration: boolean;
+    removeUpgradeButton: boolean;
+    restartOnConfigChanges: boolean;
+    trayClickPlayPause: boolean;
+    autoResetAppCache: boolean;
+    resumeOnStart: boolean;
+    likeButtons: string;
+    proxy: string;
+    startingPage: string;
+    overrideUserAgent: boolean;
+    themes: string[];
+  }
+}
+
 const defaultConfig = {
   'window-size': {
     width: 1100,
@@ -54,15 +87,22 @@ const defaultConfig = {
     'downloader': {
       enabled: false,
       ffmpegArgs: [], // E.g. ["-b:a", "192k"] for an audio bitrate of 192kb/s
-      downloadFolder: undefined, // Custom download folder (absolute path)
+      downloadFolder: undefined as string | undefined, // Custom download folder (absolute path)
       preset: 'mp3',
+      skipExisting: false,
+      playlistMaxItems: undefined as number | undefined,
     },
     'last-fm': {
       enabled: false,
+      token: undefined as string | undefined, // Token used for authentication
+      session_key: undefined as string | undefined, // Session key used for scrobbling
       api_root: 'http://ws.audioscrobbler.com/2.0/',
       api_key: '04d76faaac8726e60988e14c105d421a', // Api key registered by @semvis123
       secret: 'a5d2a36fdf64819290f6982481eaffa2',
     },
+    'lyric-genius': {
+      romanizedLyrics: false,
+    },
     'discord': {
       enabled: false,
       autoReconnect: true, // If enabled, will try to reconnect to discord every 5 seconds after disconnecting or failing to connect
diff --git a/package-lock.json b/package-lock.json
index 8bd2a261..51f51d3d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -36,6 +36,7 @@
         "keyboardevents-areequal": "0.2.2",
         "md5": "2.3.0",
         "mpris-service": "2.1.2",
+        "node-id3": "0.2.6",
         "simple-youtube-age-restriction-bypass": "git+https://github.com/zerodytrash/Simple-YouTube-Age-Restriction-Bypass.git#v2.5.9",
         "vudio": "2.1.1",
         "youtubei.js": "6.1.0",
@@ -44,7 +45,10 @@
       "devDependencies": {
         "@playwright/test": "1.37.1",
         "@total-typescript/ts-reset": "0.5.1",
+        "@types/electron-localshortcut": "^3.1.0",
         "@types/howler": "^2.2.8",
+        "@types/html-to-text": "^9.0.1",
+        "@types/md5": "^2.3.2",
         "@types/youtube-player": "^5.5.7",
         "@typescript-eslint/eslint-plugin": "6.5.0",
         "auto-changelog": "2.4.0",
@@ -1169,6 +1173,15 @@
         "@types/ms": "*"
       }
     },
+    "node_modules/@types/electron-localshortcut": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/@types/electron-localshortcut/-/electron-localshortcut-3.1.0.tgz",
+      "integrity": "sha512-upKSXMxBPRdz5kmcXfdfn+hWH9PCAvwhyVozDXTIwwHQ1lUJcdSgGUfxOC1QBlnAPKPqcW/r4icWfMosKz8ibg==",
+      "dev": true,
+      "dependencies": {
+        "electron": "*"
+      }
+    },
     "node_modules/@types/filesystem": {
       "version": "0.0.32",
       "resolved": "https://registry.npmjs.org/@types/filesystem/-/filesystem-0.0.32.tgz",
@@ -1207,6 +1220,12 @@
       "integrity": "sha512-7OK+cGHTWIDCOvBlEc61Lzj2tJhCpmeqiqdeNbZvTxLHluBMF6xz/2wjoQkK1M8mJIStp40OdPnkp8xIvwwsuw==",
       "dev": true
     },
+    "node_modules/@types/html-to-text": {
+      "version": "9.0.1",
+      "resolved": "https://registry.npmjs.org/@types/html-to-text/-/html-to-text-9.0.1.tgz",
+      "integrity": "sha512-sHu702QGb0SP2F0Zt+CxdCmGZIZ0gEaaCjqOh/V4iba1wTxPVntEPOM/vHm5bel08TILhB3+OxUTkDJWnr/zHQ==",
+      "dev": true
+    },
     "node_modules/@types/http-cache-semantics": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/@types/http-cache-semantics/-/http-cache-semantics-4.0.1.tgz",
@@ -1232,6 +1251,12 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/md5": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/@types/md5/-/md5-2.3.2.tgz",
+      "integrity": "sha512-v+JFDu96+UYJ3/UWzB0mEglIS//MZXgRaJ4ubUPwOM0gvLc/kcQ3TWNYwENEK7/EcXGQVrW8h/XqednSjBd/Og==",
+      "dev": true
+    },
     "node_modules/@types/minimist": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/@types/minimist/-/minimist-1.2.2.tgz",
@@ -6571,6 +6596,25 @@
         "node": "^12.13 || ^14.13 || >=16"
       }
     },
+    "node_modules/node-id3": {
+      "version": "0.2.6",
+      "resolved": "https://registry.npmjs.org/node-id3/-/node-id3-0.2.6.tgz",
+      "integrity": "sha512-w8GuKXLlPpDjTxLowCt/uYMhRQzED3cg2GdSG1i6RSGKeDzPvxlXeLQuQInKljahPZ0aDnmyX7FX8BbJOM7REg==",
+      "dependencies": {
+        "iconv-lite": "0.6.2"
+      }
+    },
+    "node_modules/node-id3/node_modules/iconv-lite": {
+      "version": "0.6.2",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.2.tgz",
+      "integrity": "sha512-2y91h5OpQlolefMPmUlivelittSWy0rP+oYVpn6A7GwVHNE8AWzoYOBNmlwks3LobaJxgHCYZAnyNo2GgpNRNQ==",
+      "dependencies": {
+        "safer-buffer": ">= 2.1.2 < 3.0.0"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/nopt": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/nopt/-/nopt-6.0.0.tgz",
@@ -7783,8 +7827,7 @@
     "node_modules/safer-buffer": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
-      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
-      "devOptional": true
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
     },
     "node_modules/sanitize-filename": {
       "version": "1.6.3",
diff --git a/package.json b/package.json
index 6fe08c21..3c2c0ee3 100644
--- a/package.json
+++ b/package.json
@@ -98,7 +98,7 @@
     "lint": "xo",
     "changelog": "auto-changelog",
     "plugins": "npm run plugin:adblocker && npm run plugin:bypass-age-restrictions",
-    "plugin:adblocker": "del-cli plugins/adblocker/ad-blocker-engine.bin && node plugins/adblocker/blocker.ts",
+    "plugin:adblocker": "del-cli plugins/adblocker/ad-blocker-engine.bin && tsc plugins/adblocker/blocker.ts && node dist/plugins/adblocker/blocker.js",
     "plugin:bypass-age-restrictions": "del-cli node_modules/simple-youtube-age-restriction-bypass/package.json && npm run generate:package simple-youtube-age-restriction-bypass",
     "release:linux": "npm run clean && electron-builder --linux -p always -c.snap.publish=github",
     "release:mac": "npm run clean && electron-builder --mac -p always",
@@ -135,6 +135,7 @@
     "keyboardevents-areequal": "0.2.2",
     "md5": "2.3.0",
     "mpris-service": "2.1.2",
+    "node-id3": "0.2.6",
     "simple-youtube-age-restriction-bypass": "git+https://github.com/zerodytrash/Simple-YouTube-Age-Restriction-Bypass.git#v2.5.9",
     "vudio": "2.1.1",
     "youtubei.js": "6.1.0",
@@ -149,7 +150,10 @@
   "devDependencies": {
     "@playwright/test": "1.37.1",
     "@total-typescript/ts-reset": "0.5.1",
+    "@types/electron-localshortcut": "^3.1.0",
     "@types/howler": "^2.2.8",
+    "@types/html-to-text": "^9.0.1",
+    "@types/md5": "^2.3.2",
     "@types/youtube-player": "^5.5.7",
     "@typescript-eslint/eslint-plugin": "6.5.0",
     "auto-changelog": "2.4.0",
diff --git a/plugins/discord/back.ts b/plugins/discord/back.ts
index eb9ce125..f0970c3a 100644
--- a/plugins/discord/back.ts
+++ b/plugins/discord/back.ts
@@ -162,7 +162,7 @@ export default (
       largeImageKey: songInfo.imageSrc ?? '',
       largeImageText: songInfo.album ?? '',
       buttons: options.listenAlong ? [
-        { label: 'Listen Along', url: songInfo.url },
+        { label: 'Listen Along', url: songInfo.url ?? '' },
       ] : undefined,
     };
 
@@ -176,7 +176,7 @@ export default (
       }
     } else if (!options.hideDurationLeft) {
       // Add the start and end time of the song
-      const songStartTime = Date.now() - (songInfo.elapsedSeconds * 1000);
+      const songStartTime = Date.now() - ((songInfo.elapsedSeconds ?? 0) * 1000);
       activityInfo.startTimestamp = songStartTime;
       activityInfo.endTimestamp
         = songStartTime + (songInfo.songDuration * 1000);
diff --git a/plugins/downloader/back.js b/plugins/downloader/back.ts
similarity index 59%
rename from plugins/downloader/back.js
rename to plugins/downloader/back.ts
index 9144f83c..f30f532a 100644
--- a/plugins/downloader/back.js
+++ b/plugins/downloader/back.ts
@@ -1,58 +1,64 @@
-const {
+
+import {
   existsSync,
   mkdirSync,
   createWriteStream,
   writeFileSync,
-} = require('node:fs');
-const { join } = require('node:path');
+} from 'node:fs';
+import { join } from 'node:path';
+import { randomBytes } from 'node:crypto';
 
-const { randomBytes } = require('node:crypto');
+import { app, BrowserWindow, dialog, ipcMain } from 'electron';
+import { ClientType, Innertube, UniversalCache, Utils } from 'youtubei.js';
+import is from 'electron-is';
+import ytpl from 'ytpl';
+ // REPLACE with youtubei getplaylist https://github.com/LuanRT/YouTube.js#getplaylistid
+import filenamify from 'filenamify';
+import { Mutex } from 'async-mutex';
+import { createFFmpeg } from '@ffmpeg/ffmpeg';
 
-const { ipcMain, app, dialog } = require('electron');
-const is = require('electron-is');
-const { Innertube, UniversalCache, Utils, ClientType } = require('youtubei.js');
-const ytpl = require('ytpl'); // REPLACE with youtubei getplaylist https://github.com/LuanRT/YouTube.js#getplaylistid
-const filenamify = require('filenamify');
-const ID3Writer = require('browser-id3-writer');
-const { Mutex } = require('async-mutex');
-const ffmpeg = require('@ffmpeg/ffmpeg').createFFmpeg({
+import NodeID3, { TagConstants } from 'node-id3';
+
+import PlayerErrorMessage from 'youtubei.js/dist/src/parser/classes/PlayerErrorMessage';
+import { FormatOptions } from 'youtubei.js/dist/src/types/FormatUtils';
+
+import TrackInfo from 'youtubei.js/dist/src/parser/ytmusic/TrackInfo';
+
+import { VideoInfo } from 'youtubei.js/dist/src/parser/youtube';
+
+import { cropMaxWidth, getFolder, presets, sendFeedback as sendFeedback_, setBadge } from './utils';
+
+import config from './config';
+
+import { fetchFromGenius } from '../lyrics-genius/back';
+import { isEnabled } from '../../config/plugins';
+import { cleanupName, getImage, SongInfo } from '../../providers/song-info';
+import { injectCSS } from '../utils';
+import { cache } from '../../providers/decorators';
+import { GetPlayerResponse } from '../../types/get-player-response';
+
+type CustomSongInfo = SongInfo & { trackId?: string };
+
+const ffmpeg = createFFmpeg({
   log: false,
   logger() {
   }, // Console.log,
   progress() {
   }, // Console.log,
 });
-
-const {
-  presets,
-  cropMaxWidth,
-  getFolder,
-  setBadge,
-  sendFeedback: sendFeedback_,
-} = require('./utils');
-
-const config = require('./config');
-
-const { fetchFromGenius } = require('../lyrics-genius/back');
-const { isEnabled } = require('../../config/plugins');
-const { getImage, cleanupName } = require('../../providers/song-info');
-const { injectCSS } = require('../utils');
-const { cache } = require('../../providers/decorators');
-
 const ffmpegMutex = new Mutex();
 
-/** @type {Innertube} */
-let yt;
-let win;
-let playingUrl;
+let yt: Innertube;
+let win: BrowserWindow;
+let playingUrl: string;
 
-const sendError = (error, source) => {
+const sendError = (error: Error, source?: string) => {
   win.setProgressBar(-1); // Close progress bar
   setBadge(0); // Close badge
   sendFeedback_(win); // Reset feedback
 
   const songNameMessage = source ? `\nin ${source}` : '';
-  const cause = error.cause ? `\n\n${error.cause.toString()}` : '';
+  const cause = error.cause ? `\n\n${String(error.cause)}` : '';
   const message = `${error.toString()}${songNameMessage}${cause}`;
 
   console.error(message);
@@ -65,7 +71,7 @@ const sendError = (error, source) => {
   });
 };
 
-module.exports = async (win_) => {
+export default async (win_: BrowserWindow) => {
   win = win_;
   injectCSS(win.webContents, join(__dirname, 'style.css'));
 
@@ -73,52 +79,48 @@ module.exports = async (win_) => {
     cache: new UniversalCache(false),
     generate_session_locally: true,
   });
-  ipcMain.on('download-song', (_, url) => downloadSong(url));
-  ipcMain.on('video-src-changed', async (_, data) => {
-    playingUrl
-      = JSON.parse(data)?.microformat?.microformatDataRenderer?.urlCanonical;
+  ipcMain.on('download-song', (_, url: string) => downloadSong(url));
+  ipcMain.on('video-src-changed', (_, data: string) => {
+    playingUrl = (JSON.parse(data) as GetPlayerResponse).microformat.microformatDataRenderer.urlCanonical;
   });
-  ipcMain.on('download-playlist-request', async (_event, url) =>
+  ipcMain.on('download-playlist-request', async (_event, url: string) =>
     downloadPlaylist(url),
   );
 };
 
-module.exports.downloadSong = downloadSong;
-module.exports.downloadPlaylist = downloadPlaylist;
-
-async function downloadSong(
-  url,
-  playlistFolder = undefined,
-  trackId = undefined,
-  increasePlaylistProgress = () => {
+export async function downloadSong(
+  url: string,
+  playlistFolder: string | undefined = undefined,
+  trackId: string | undefined = undefined,
+  increasePlaylistProgress: (value: number) => void = () => {
   },
 ) {
   let resolvedName;
   try {
     await downloadSongUnsafe(
       url,
-      (name) => resolvedName = name,
+      (name: string) => resolvedName = name,
       playlistFolder,
       trackId,
       increasePlaylistProgress,
     );
-  } catch (error) {
-    sendError(error, resolvedName || url);
+  } catch (error: unknown) {
+    sendError(error as Error, resolvedName || url);
   }
 }
 
 async function downloadSongUnsafe(
-  url,
-  setName,
-  playlistFolder = undefined,
-  trackId = undefined,
-  increasePlaylistProgress = () => {
+  url: string,
+  setName: (name: string) => void,
+  playlistFolder: string | undefined = undefined,
+  trackId: string | undefined = undefined,
+  increasePlaylistProgress: (value: number) => void = () => {
   },
 ) {
-  const sendFeedback = (message, progress) => {
+  const sendFeedback = (message: unknown, progress?: number) => {
     if (!playlistFolder) {
       sendFeedback_(win, message);
-      if (!isNaN(progress)) {
+      if (progress && !isNaN(progress)) {
         win.setProgressBar(progress);
       }
     }
@@ -127,7 +129,9 @@ async function downloadSongUnsafe(
   sendFeedback('Downloading...', 2);
 
   const id = getVideoId(url);
-  let info = await yt.music.getInfo(id);
+  if (typeof id !== 'string') throw new Error('Video not found');
+
+  let info: TrackInfo | VideoInfo = await yt.music.getInfo(id);
 
   if (!info) {
     throw new Error('Video not found');
@@ -164,19 +168,19 @@ async function downloadSongUnsafe(
   }
 
   if (playabilityStatus.status === 'UNPLAYABLE') {
-    /**
-     * @typedef {import('youtubei.js/dist/src/parser/classes/PlayerErrorMessage').default} PlayerErrorMessage
-     * @type {PlayerErrorMessage}
-     */
-    const errorScreen = playabilityStatus.error_screen;
+    const errorScreen = playabilityStatus.error_screen as PlayerErrorMessage | null;
     throw new Error(
-      `[${playabilityStatus.status}] ${errorScreen.reason.text}: ${errorScreen.subreason.text}`,
+      `[${playabilityStatus.status}] ${errorScreen?.reason.text}: ${errorScreen?.subreason.text}`,
     );
   }
 
-  const extension = presets[config.get('preset')]?.extension || 'mp3';
+  const preset = config.get('preset') ?? 'mp3';
+  let presetSetting: { extension: string; ffmpegArgs: string[] } | null = null;
+  if (preset === 'opus') {
+    presetSetting = presets[preset];
+  }
 
-  const filename = filenamify(`${name}.${extension}`, {
+  const filename = filenamify(`${name}.${presetSetting?.extension ?? 'mp3'}`, {
     replacement: '_',
     maxLength: 255,
   });
@@ -187,7 +191,7 @@ async function downloadSongUnsafe(
     return;
   }
 
-  const downloadOptions = {
+  const downloadOptions: FormatOptions = {
     type: 'audio', // Audio, video or video+audio
     quality: 'best', // Best, bestefficiency, 144p, 240p, 480p, 720p and so on.
     format: 'any', // Media container format
@@ -197,7 +201,7 @@ async function downloadSongUnsafe(
   const stream = await info.download(downloadOptions);
 
   console.info(
-    `Downloading ${metadata.artist} - ${metadata.title} [${metadata.id}]`,
+    `Downloading ${metadata.artist} - ${metadata.title} [${metadata.videoId}]`,
   );
 
   const iterableStream = Utils.streamToIterable(stream);
@@ -206,10 +210,10 @@ async function downloadSongUnsafe(
     mkdirSync(dir);
   }
 
-  if (presets[config.get('preset')]) {
+  if (presetSetting) {
     const file = createWriteStream(filePath);
     let downloaded = 0;
-    const total = format.content_length;
+    const total: number = format.content_length ?? 1;
 
     for await (const chunk of iterableStream) {
       downloaded += chunk.length;
@@ -223,18 +227,23 @@ async function downloadSongUnsafe(
     await ffmpegWriteTags(
       filePath,
       metadata,
-      presets[config.get('preset')]?.ffmpegArgs,
+      presetSetting.ffmpegArgs,
     );
     sendFeedback(null, -1);
   } else {
     const fileBuffer = await iterableStreamToMP3(
       iterableStream,
       metadata,
-      format.content_length,
+      format.content_length ?? 0,
       sendFeedback,
       increasePlaylistProgress,
     );
-    writeFileSync(filePath, await writeID3(fileBuffer, metadata, sendFeedback));
+    if (fileBuffer) {
+      const buffer = await writeID3(Buffer.from(fileBuffer), metadata, sendFeedback);
+      if (buffer) {
+        writeFileSync(filePath, buffer);
+      }
+    }
   }
 
   sendFeedback(null, -1);
@@ -242,11 +251,11 @@ async function downloadSongUnsafe(
 }
 
 async function iterableStreamToMP3(
-  stream,
-  metadata,
-  contentLength,
-  sendFeedback,
-  increasePlaylistProgress = () => {
+  stream: AsyncGenerator<Uint8Array, void>,
+  metadata: CustomSongInfo,
+  contentLength: number,
+  sendFeedback: (str: string, value?: number) => void,
+  increasePlaylistProgress: (value: number) => void = () => {
   },
 ) {
   const chunks = [];
@@ -294,66 +303,69 @@ async function iterableStreamToMP3(
     sendFeedback('Saving…');
 
     return ffmpeg.FS('readFile', `${safeVideoName}.mp3`);
-  } catch (error) {
-    sendError(error, safeVideoName);
+  } catch (error: unknown) {
+    sendError(error as Error, safeVideoName);
   } finally {
     releaseFFmpegMutex();
   }
 }
 
-const getCoverBuffer = cache(async (url) => {
+const getCoverBuffer = cache(async (url: string) => {
   const nativeImage = cropMaxWidth(await getImage(url));
   return nativeImage && !nativeImage.isEmpty() ? nativeImage.toPNG() : null;
 });
 
-async function writeID3(buffer, metadata, sendFeedback) {
+async function writeID3(buffer: Buffer, metadata: CustomSongInfo, sendFeedback: (str: string, value?: number) => void) {
   try {
     sendFeedback('Writing ID3 tags...');
-
-    const coverBuffer = await getCoverBuffer(metadata.image);
-
-    const writer = new ID3Writer(buffer);
+    const tags: NodeID3.Tags = {};
 
     // Create the metadata tags
-    writer.setFrame('TIT2', metadata.title).setFrame('TPE1', [metadata.artist]);
+    tags.title = metadata.title;
+    tags.artist = metadata.artist;
+
     if (metadata.album) {
-      writer.setFrame('TALB', metadata.album);
+      tags.album = metadata.album;
     }
 
+    const coverBuffer = await getCoverBuffer(metadata.imageSrc ?? '');
     if (coverBuffer) {
-      writer.setFrame('APIC', {
-        type: 3,
-        data: coverBuffer,
-        description: '',
-      });
+      tags.image = {
+        mime: 'image/png',
+        type: {
+          id: TagConstants.AttachedPicture.PictureType.FRONT_COVER,
+        },
+        description: 'thumbnail',
+        imageBuffer: coverBuffer,
+      };
     }
 
     if (isEnabled('lyrics-genius')) {
       const lyrics = await fetchFromGenius(metadata);
       if (lyrics) {
-        writer.setFrame('USLT', {
-          description: '',
-          lyrics,
-        });
+        tags.unsynchronisedLyrics = {
+          language: '',
+          text: lyrics,
+        };
       }
     }
 
     if (metadata.trackId) {
-      writer.setFrame('TRCK', metadata.trackId);
+      tags.trackNumber = metadata.trackId;
     }
 
-    writer.addTag();
-    return Buffer.from(writer.arrayBuffer);
-  } catch (error) {
-    sendError(error, `${metadata.artist} - ${metadata.title}`);
+    return NodeID3.write(tags, buffer);
+  } catch (error: unknown) {
+    sendError(error as Error, `${metadata.artist} - ${metadata.title}`);
+    return null;
   }
 }
 
-async function downloadPlaylist(givenUrl) {
+export async function downloadPlaylist(givenUrl?: string | URL) {
   try {
-    givenUrl = new URL(givenUrl);
+    givenUrl = new URL(givenUrl ?? '');
   } catch {
-    givenUrl = undefined;
+    return;
   }
 
   const playlistId
@@ -366,18 +378,18 @@ async function downloadPlaylist(givenUrl) {
     return;
   }
 
-  const sendFeedback = (message) => sendFeedback_(win, message);
+  const sendFeedback = (message?: unknown) => sendFeedback_(win, message);
 
   console.log(`trying to get playlist ID: '${playlistId}'`);
   sendFeedback('Getting playlist info…');
-  let playlist;
+  let playlist: ytpl.Result;
   try {
     playlist = await ytpl(playlistId, {
       limit: config.get('playlistMaxItems') || Number.POSITIVE_INFINITY,
     });
-  } catch (error) {
+  } catch (error: unknown) {
     sendError(
-      `Error getting playlist info: make sure it isn't a private or "Mixed for you" playlist\n\n${error}`,
+      Error(`Error getting playlist info: make sure it isn't a private or "Mixed for you" playlist\n\n${String(error)}`),
     );
     return;
   }
@@ -432,8 +444,8 @@ async function downloadPlaylist(givenUrl) {
 
   const progressStep = 1 / playlist.items.length;
 
-  const increaseProgress = (itemPercentage) => {
-    const currentProgress = (counter - 1) / playlist.items.length;
+  const increaseProgress = (itemPercentage: number) => {
+    const currentProgress = (counter - 1) / (playlist.items.length ?? 1);
     const newProgress = currentProgress + (progressStep * itemPercentage);
     win.setProgressBar(newProgress);
   };
@@ -445,11 +457,11 @@ async function downloadPlaylist(givenUrl) {
       await downloadSong(
         song.url,
         playlistFolder,
-        trackId,
+        trackId?.toString(),
         increaseProgress,
       ).catch((error) =>
         sendError(
-          `Error downloading "${song.author.name} - ${song.title}":\n  ${error}`,
+          new Error(`Error downloading "${song.author.name} - ${song.title}":\n  ${error}`)
         ),
       );
 
@@ -457,8 +469,8 @@ async function downloadPlaylist(givenUrl) {
       setBadge(playlist.items.length - counter);
       counter++;
     }
-  } catch (error) {
-    sendError(error);
+  } catch (error: unknown) {
+    sendError(error as Error);
   } finally {
     win.setProgressBar(-1); // Close progress bar
     setBadge(0); // Close badge counter
@@ -466,7 +478,7 @@ async function downloadPlaylist(givenUrl) {
   }
 }
 
-async function ffmpegWriteTags(filePath, metadata, ffmpegArgs = []) {
+async function ffmpegWriteTags(filePath: string, metadata: CustomSongInfo, ffmpegArgs: string[] = []) {
   const releaseFFmpegMutex = await ffmpegMutex.acquire();
 
   try {
@@ -481,16 +493,16 @@ async function ffmpegWriteTags(filePath, metadata, ffmpegArgs = []) {
       ...ffmpegArgs,
       filePath,
     );
-  } catch (error) {
-    sendError(error);
+  } catch (error: unknown) {
+    sendError(error as Error);
   } finally {
     releaseFFmpegMutex();
   }
 }
 
-function getFFmpegMetadataArgs(metadata) {
+function getFFmpegMetadataArgs(metadata: CustomSongInfo) {
   if (!metadata) {
-    return;
+    return [];
   }
 
   return [
@@ -504,7 +516,7 @@ function getFFmpegMetadataArgs(metadata) {
 // Playlist radio modifier needs to be cut from playlist ID
 const INVALID_PLAYLIST_MODIFIER = 'RDAMPL';
 
-const getPlaylistID = (aURL) => {
+const getPlaylistID = (aURL: URL) => {
   const result
     = aURL?.searchParams.get('list') || aURL?.searchParams.get('playlist');
   if (result?.startsWith(INVALID_PLAYLIST_MODIFIER)) {
@@ -514,7 +526,7 @@ const getPlaylistID = (aURL) => {
   return result;
 };
 
-const getVideoId = (url) => {
+const getVideoId = (url: URL | string): string | null => {
   if (typeof url === 'string') {
     url = new URL(url);
   }
@@ -522,18 +534,21 @@ const getVideoId = (url) => {
   return url.searchParams.get('v');
 };
 
-const getMetadata = (info) => ({
-  id: info.basic_info.id,
-  title: cleanupName(info.basic_info.title),
-  artist: cleanupName(info.basic_info.author),
-  album: info.player_overlays?.browser_media_session?.album?.text,
-  image: info.basic_info.thumbnail?.find((t) => !t.url.endsWith('.webp'))?.url,
+const getMetadata = (info: TrackInfo): CustomSongInfo => ({
+  videoId: info.basic_info.id!,
+  title: cleanupName(info.basic_info.title!),
+  artist: cleanupName(info.basic_info.author!),
+  // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access,@typescript-eslint/no-explicit-any
+  album: (info.player_overlays?.browser_media_session as any)?.album?.text as string | undefined,
+  imageSrc: info.basic_info.thumbnail?.find((t) => !t.url.endsWith('.webp'))?.url,
+  views: info.basic_info.view_count!,
+  songDuration: info.basic_info.duration!,
 });
 
 // This is used to bypass age restrictions
-const getAndroidTvInfo = async (id) => {
+const getAndroidTvInfo = async (id: string): Promise<VideoInfo> => {
   const innertube = await Innertube.create({
-    clientType: ClientType.TV_EMBEDDED,
+    client_type: ClientType.TV_EMBEDDED,
     generate_session_locally: true,
     retrieve_player: true,
   });
diff --git a/plugins/downloader/config.js b/plugins/downloader/config.js
deleted file mode 100644
index 8ea738d8..00000000
--- a/plugins/downloader/config.js
+++ /dev/null
@@ -1,4 +0,0 @@
-const { PluginConfig } = require('../../config/dynamic');
-
-const config = new PluginConfig('downloader');
-module.exports = { ...config };
diff --git a/plugins/downloader/config.ts b/plugins/downloader/config.ts
new file mode 100644
index 00000000..ec22de5a
--- /dev/null
+++ b/plugins/downloader/config.ts
@@ -0,0 +1,4 @@
+import { PluginConfig } from '../../config/dynamic';
+
+const config = new PluginConfig('downloader');
+export default { ...config } as PluginConfig<'downloader'>;
diff --git a/plugins/downloader/front.js b/plugins/downloader/front.ts
similarity index 69%
rename from plugins/downloader/front.js
rename to plugins/downloader/front.ts
index ef486a24..b53f5dfc 100644
--- a/plugins/downloader/front.js
+++ b/plugins/downloader/front.ts
@@ -1,11 +1,12 @@
-const { ipcRenderer } = require('electron');
+import { ipcRenderer } from 'electron';
 
-const { defaultConfig } = require('../../config');
-const { getSongMenu } = require('../../providers/dom-elements');
-const { ElementFromFile, templatePath } = require('../utils');
+import defaultConfig from '../../config/defaults';
+import { getSongMenu } from '../../providers/dom-elements';
+import { ElementFromFile, templatePath } from '../utils';
+import { getSongInfo } from '../../providers/song-info-front';
 
-let menu = null;
-let progress = null;
+let menu: Element | null = null;
+let progress: Element | null = null;
 const downloadButton = ElementFromFile(
   templatePath(__dirname, 'download.html'),
 );
@@ -24,7 +25,7 @@ const menuObserver = new MutationObserver(() => {
     return;
   }
 
-  const menuUrl = document.querySelector('tp-yt-paper-listbox [tabindex="0"] #navigation-endpoint')?.href;
+  const menuUrl = (document.querySelector('tp-yt-paper-listbox [tabindex="0"] #navigation-endpoint') as HTMLAnchorElement | undefined)?.href;
   if (!menuUrl?.includes('watch?') && doneFirstLoad) {
     return;
   }
@@ -42,7 +43,7 @@ const menuObserver = new MutationObserver(() => {
 // TODO: re-enable once contextIsolation is set to true
 // contextBridge.exposeInMainWorld("downloader", {
 // download: () => {
-global.download = () => {
+export const download = () => {
   let videoUrl = getSongMenu()
     // Selector of first button which is always "Start Radio"
     ?.querySelector('ytmusic-menu-navigation-item-renderer[tabindex="0"] #navigation-endpoint')
@@ -57,21 +58,21 @@ global.download = () => {
       return;
     }
   } else {
-    videoUrl = global.songInfo.url || window.location.href;
+    videoUrl = getSongInfo().url || window.location.href;
   }
 
   ipcRenderer.send('download-song', videoUrl);
 };
 
-module.exports = () => {
+export default () => {
   document.addEventListener('apiLoaded', () => {
-    menuObserver.observe(document.querySelector('ytmusic-popup-container'), {
+    menuObserver.observe(document.querySelector('ytmusic-popup-container')!, {
       childList: true,
       subtree: true,
     });
   }, { once: true, passive: true });
 
-  ipcRenderer.on('downloader-feedback', (_, feedback) => {
+  ipcRenderer.on('downloader-feedback', (_, feedback: string) => {
     if (progress) {
       progress.innerHTML = feedback || 'Download';
     } else {
diff --git a/plugins/downloader/menu.js b/plugins/downloader/menu.ts
similarity index 76%
rename from plugins/downloader/menu.js
rename to plugins/downloader/menu.ts
index 57953fe9..be5f8430 100644
--- a/plugins/downloader/menu.js
+++ b/plugins/downloader/menu.ts
@@ -1,10 +1,12 @@
-const { dialog } = require('electron');
+import { dialog } from 'electron';
 
-const { downloadPlaylist } = require('./back');
-const { defaultMenuDownloadLabel, getFolder, presets } = require('./utils');
-const config = require('./config');
+import { downloadPlaylist } from './back';
+import { defaultMenuDownloadLabel, getFolder, presets } from './utils';
+import config from './config';
 
-module.exports = () => [
+import { MenuTemplate } from '../../menu';
+
+export default (): MenuTemplate => [
   {
     label: defaultMenuDownloadLabel,
     click: () => downloadPlaylist(),
diff --git a/plugins/downloader/utils.js b/plugins/downloader/utils.ts
similarity index 57%
rename from plugins/downloader/utils.js
rename to plugins/downloader/utils.ts
index 2b311d60..7de1f096 100644
--- a/plugins/downloader/utils.js
+++ b/plugins/downloader/utils.ts
@@ -1,14 +1,14 @@
-const { app } = require('electron');
-const is = require('electron-is');
+import { app, BrowserWindow } from 'electron';
+import is from 'electron-is';
 
-module.exports.getFolder = (customFolder) => customFolder || app.getPath('downloads');
-module.exports.defaultMenuDownloadLabel = 'Download playlist';
+export const getFolder = (customFolder: string) => customFolder || app.getPath('downloads');
+export const defaultMenuDownloadLabel = 'Download playlist';
 
-module.exports.sendFeedback = (win, message) => {
+export const sendFeedback = (win: BrowserWindow, message?: unknown) => {
   win.webContents.send('downloader-feedback', message);
 };
 
-module.exports.cropMaxWidth = (image) => {
+export const cropMaxWidth = (image: Electron.NativeImage) => {
   const imageSize = image.getSize();
   // Standart youtube artwork width with margins from both sides is 280 + 720 + 280
   if (imageSize.width === 1280 && imageSize.height === 720) {
@@ -24,7 +24,7 @@ module.exports.cropMaxWidth = (image) => {
 };
 
 // Presets for FFmpeg
-module.exports.presets = {
+export const presets = {
   'None (defaults to mp3)': undefined,
   'opus': {
     extension: 'opus',
@@ -32,7 +32,7 @@ module.exports.presets = {
   },
 };
 
-module.exports.setBadge = (n) => {
+export const setBadge = (n: number) => {
   if (is.linux() || is.macOS()) {
     app.setBadgeCount(n);
   }
diff --git a/plugins/in-app-menu/back.js b/plugins/in-app-menu/back.js
deleted file mode 100644
index 9b5e4577..00000000
--- a/plugins/in-app-menu/back.js
+++ /dev/null
@@ -1,23 +0,0 @@
-const path = require('node:path');
-
-const electronLocalshortcut = require('electron-localshortcut');
-const { setupTitlebar, attachTitlebarToWindow } = require('custom-electron-titlebar/main');
-
-const { injectCSS } = require('../utils');
-
-setupTitlebar();
-
-// Tracks menu visibility
-
-module.exports = (win) => {
-  // Css for custom scrollbar + disable drag area(was causing bugs)
-  injectCSS(win.webContents, path.join(__dirname, 'style.css'));
-
-  win.once('ready-to-show', () => {
-    attachTitlebarToWindow(win);
-
-    electronLocalshortcut.register(win, '`', () => {
-      win.webContents.send('toggleMenu');
-    });
-  });
-};
diff --git a/plugins/in-app-menu/back.ts b/plugins/in-app-menu/back.ts
new file mode 100644
index 00000000..3fd13edf
--- /dev/null
+++ b/plugins/in-app-menu/back.ts
@@ -0,0 +1,27 @@
+import path from 'node:path';
+
+import { register } from 'electron-localshortcut';
+// eslint-disable-next-line import/no-unresolved
+import { attachTitlebarToWindow, setupTitlebar } from 'custom-electron-titlebar/main';
+
+import { BrowserWindow } from 'electron';
+
+import { injectCSS } from '../utils';
+
+
+setupTitlebar();
+
+// Tracks menu visibility
+
+module.exports = (win: BrowserWindow) => {
+  // Css for custom scrollbar + disable drag area(was causing bugs)
+  injectCSS(win.webContents, path.join(__dirname, 'style.css'));
+
+  win.once('ready-to-show', () => {
+    attachTitlebarToWindow(win);
+
+    register(win, '`', () => {
+      win.webContents.send('toggleMenu');
+    });
+  });
+};
diff --git a/plugins/in-app-menu/custom-electron-titlebar.d.ts b/plugins/in-app-menu/custom-electron-titlebar.d.ts
new file mode 100644
index 00000000..f724278d
--- /dev/null
+++ b/plugins/in-app-menu/custom-electron-titlebar.d.ts
@@ -0,0 +1,9 @@
+declare module 'custom-electron-titlebar' {
+  // eslint-disable-next-line import/no-unresolved
+  import OriginalTitlebar from 'custom-electron-titlebar/dist/titlebar';
+  // eslint-disable-next-line import/no-unresolved
+  import { Color as OriginalColor } from 'custom-electron-titlebar/dist/vs/base/common/color';
+
+  export const Color: typeof OriginalColor;
+  export const Titlebar: typeof OriginalTitlebar;
+}
diff --git a/plugins/in-app-menu/front.js b/plugins/in-app-menu/front.js
deleted file mode 100644
index 83d8fe38..00000000
--- a/plugins/in-app-menu/front.js
+++ /dev/null
@@ -1,78 +0,0 @@
-const { ipcRenderer } = require('electron');
-const { Titlebar, Color } = require('custom-electron-titlebar');
-
-const config = require('../../config');
-const { isEnabled } = require('../../config/plugins');
-
-function $(selector) {
-  return document.querySelector(selector);
-}
-
-module.exports = () => {
-  const visible = () => Boolean($('.cet-menubar').firstChild);
-  const bar = new Titlebar({
-    icon: 'https://cdn-icons-png.flaticon.com/512/5358/5358672.png',
-    backgroundColor: Color.fromHex('#050505'),
-    itemBackgroundColor: Color.fromHex('#1d1d1d'),
-    svgColor: Color.WHITE,
-    menu: config.get('options.hideMenu') ? null : undefined,
-  });
-  bar.updateTitle(' ');
-  document.title = 'Youtube Music';
-
-  const toggleMenu = () => {
-    if (visible()) {
-      bar.updateMenu(null);
-    } else {
-      bar.refreshMenu();
-    }
-  };
-
-  $('.cet-window-icon').addEventListener('click', toggleMenu);
-  ipcRenderer.on('toggleMenu', toggleMenu);
-
-  ipcRenderer.on('refreshMenu', () => {
-    if (visible()) {
-      bar.refreshMenu();
-    }
-  });
-
-  if (isEnabled('picture-in-picture')) {
-    ipcRenderer.on('pip-toggle', () => {
-      bar.refreshMenu();
-    });
-  }
-
-  // Increases the right margin of Navbar background when the scrollbar is visible to avoid blocking it (z-index doesn't affect it)
-  document.addEventListener('apiLoaded', () => {
-    setNavbarMargin();
-    const playPageObserver = new MutationObserver(setNavbarMargin);
-    playPageObserver.observe($('ytmusic-app-layout'), { attributeFilter: ['player-page-open_', 'playerPageOpen_'] });
-    setupSearchOpenObserver();
-    setupMenuOpenObserver();
-  }, { once: true, passive: true });
-};
-
-function setupSearchOpenObserver() {
-  const searchOpenObserver = new MutationObserver((mutations) => {
-    $('#nav-bar-background').style.webkitAppRegion
-      = mutations[0].target.opened ? 'no-drag' : 'drag';
-  });
-  searchOpenObserver.observe($('ytmusic-search-box'), { attributeFilter: ['opened'] });
-}
-
-function setupMenuOpenObserver() {
-  const menuOpenObserver = new MutationObserver(() => {
-    $('#nav-bar-background').style.webkitAppRegion
-      = [...$('.cet-menubar').childNodes].some((c) => c.classList.contains('open'))
-      ? 'no-drag' : 'drag';
-  });
-  menuOpenObserver.observe($('.cet-menubar'), { subtree: true, attributeFilter: ['class'] });
-}
-
-function setNavbarMargin() {
-  $('#nav-bar-background').style.right
-    = $('ytmusic-app-layout').playerPageOpen_
-    ? '0px'
-    : '12px';
-}
diff --git a/plugins/in-app-menu/front.ts b/plugins/in-app-menu/front.ts
new file mode 100644
index 00000000..61c09387
--- /dev/null
+++ b/plugins/in-app-menu/front.ts
@@ -0,0 +1,96 @@
+import { ipcRenderer, Menu } from 'electron';
+// eslint-disable-next-line import/no-unresolved
+import { Color, Titlebar } from 'custom-electron-titlebar';
+
+import config from '../../config';
+import { isEnabled } from '../../config/plugins';
+
+function $(selector: string) {
+  return document.querySelector(selector);
+}
+
+module.exports = () => {
+  const visible = () => Boolean($('.cet-menubar')?.firstChild);
+  const bar = new Titlebar({
+    icon: 'https://cdn-icons-png.flaticon.com/512/5358/5358672.png',
+    backgroundColor: Color.fromHex('#050505'),
+    itemBackgroundColor: Color.fromHex('#1d1d1d') ,
+    svgColor: Color.WHITE,
+    menu: config.get('options.hideMenu') ? null as unknown as Menu : undefined,
+  });
+  bar.updateTitle(' ');
+  document.title = 'Youtube Music';
+
+  const toggleMenu = () => {
+    if (visible()) {
+      bar.updateMenu(null as unknown as Menu);
+    } else {
+      bar.refreshMenu();
+    }
+  };
+
+  $('.cet-window-icon')?.addEventListener('click', toggleMenu);
+  ipcRenderer.on('toggleMenu', toggleMenu);
+
+  ipcRenderer.on('refreshMenu', () => {
+    if (visible()) {
+      bar.refreshMenu();
+    }
+  });
+
+  if (isEnabled('picture-in-picture')) {
+    ipcRenderer.on('pip-toggle', () => {
+      bar.refreshMenu();
+    });
+  }
+
+  // Increases the right margin of Navbar background when the scrollbar is visible to avoid blocking it (z-index doesn't affect it)
+  document.addEventListener('apiLoaded', () => {
+    setNavbarMargin();
+    const playPageObserver = new MutationObserver(setNavbarMargin);
+    const appLayout = $('ytmusic-app-layout');
+    if (appLayout) {
+      playPageObserver.observe(appLayout, { attributeFilter: ['player-page-open_', 'playerPageOpen_'] });
+    }
+    setupSearchOpenObserver();
+    setupMenuOpenObserver();
+  }, { once: true, passive: true });
+};
+
+function setupSearchOpenObserver() {
+  const searchOpenObserver = new MutationObserver((mutations) => {
+    ($('#nav-bar-background') as HTMLElement)
+      .style
+      .setProperty(
+        '-webkit-app-region',
+        (mutations[0].target as HTMLElement & { opened: boolean }).opened ? 'no-drag' : 'drag',
+      );
+  });
+  const searchBox = $('ytmusic-search-box');
+  if (searchBox) {
+    searchOpenObserver.observe(searchBox, { attributeFilter: ['opened'] });
+  }
+}
+
+function setupMenuOpenObserver() {
+  const cetMenubar = $('.cet-menubar');
+  if (cetMenubar) {
+    const menuOpenObserver = new MutationObserver(() => {
+      ($('#nav-bar-background') as HTMLElement)
+        .style
+        .setProperty(
+          '-webkit-app-region',
+          Array.from(cetMenubar.childNodes).some((c) => (c as HTMLElement).classList.contains('open')) ? 'no-drag' : 'drag',
+        );
+    });
+    menuOpenObserver.observe(cetMenubar, { subtree: true, attributeFilter: ['class'] });
+  }
+}
+
+function setNavbarMargin() {
+  const navBarBackground = $('#nav-bar-background') as HTMLElement;
+  navBarBackground.style.right
+    = ($('ytmusic-app-layout') as HTMLElement & { playerPageOpen_: boolean }).playerPageOpen_
+    ? '0px'
+    : '12px';
+}
diff --git a/plugins/last-fm/back.js b/plugins/last-fm/back.ts
similarity index 53%
rename from plugins/last-fm/back.js
rename to plugins/last-fm/back.ts
index 7593f1c1..2a83d9ee 100644
--- a/plugins/last-fm/back.js
+++ b/plugins/last-fm/back.ts
@@ -1,32 +1,41 @@
-const { shell, net } = require('electron');
-const md5 = require('md5');
+import { BrowserWindow, net, shell } from 'electron';
+import md5 from 'md5';
 
-const { setOptions } = require('../../config/plugins');
-const registerCallback = require('../../providers/song-info');
-const defaultConfig = require('../../config/defaults');
+import { setOptions } from '../../config/plugins';
+import registerCallback, { SongInfo } from '../../providers/song-info';
+import defaultConfig from '../../config/defaults';
+import config from '../../config';
 
-const createFormData = (parameters) => {
+const LastFMOptionsObj = config.get('plugins.last-fm');
+type LastFMOptions = typeof LastFMOptionsObj;
+
+interface LastFmData {
+  method: string,
+  timestamp?: number,
+}
+
+const createFormData = (parameters: Record<string, unknown>) => {
   // Creates the body for in the post request
   const formData = new URLSearchParams();
   for (const key in parameters) {
-    formData.append(key, parameters[key]);
+    formData.append(key, String(parameters[key]));
   }
 
   return formData;
 };
 
-const createQueryString = (parameters, apiSignature) => {
+const createQueryString = (parameters: Record<string, unknown>, apiSignature: string) => {
   // Creates a querystring
   const queryData = [];
   parameters.api_sig = apiSignature;
   for (const key in parameters) {
-    queryData.push(`${encodeURIComponent(key)}=${encodeURIComponent(parameters[key])}`);
+    queryData.push(`${encodeURIComponent(key)}=${encodeURIComponent(String(parameters[key]))}`);
   }
 
   return '?' + queryData.join('&');
 };
 
-const createApiSig = (parameters, secret) => {
+const createApiSig = (parameters: Record<string, unknown>, secret: string) => {
   // This function creates the api signature, see: https://www.last.fm/api/authspec
   const keys = [];
   for (const key in parameters) {
@@ -40,7 +49,7 @@ const createApiSig = (parameters, secret) => {
       continue;
     }
 
-    sig += `${key}${parameters[key]}`;
+    sig += `${key}${String(parameters[key])}`;
   }
 
   sig += secret;
@@ -48,7 +57,7 @@ const createApiSig = (parameters, secret) => {
   return sig;
 };
 
-const createToken = async ({ apiKey, apiRoot, secret }) => {
+const createToken = async ({ api_key: apiKey, api_root: apiRoot, secret }: LastFMOptions) => {
   // Creates and stores the auth token
   const data = {
     method: 'auth.gettoken',
@@ -56,20 +65,18 @@ const createToken = async ({ apiKey, apiRoot, secret }) => {
     format: 'json',
   };
   const apiSigature = createApiSig(data, secret);
-  let response = await net.fetch(`${apiRoot}${createQueryString(data, apiSigature)}`);
-  response = await response.json();
-  return response?.token;
+  const response = await net.fetch(`${apiRoot}${createQueryString(data, apiSigature)}`);
+  const json = await response.json() as Record<string, string>;
+  return json?.token;
 };
 
-const authenticate = async (config) => {
+const authenticateAndGetToken = async (config: LastFMOptions) => {
   // Asks the user for authentication
-  config.token = await createToken(config);
-  setOptions('last-fm', config);
-  shell.openExternal(`https://www.last.fm/api/auth/?api_key=${config.api_key}&token=${config.token}`);
-  return config;
+  await shell.openExternal(`https://www.last.fm/api/auth/?api_key=${config.api_key}&token=${config.token}`);
+  return await createToken(config);
 };
 
-const getAndSetSessionKey = async (config) => {
+const getAndSetSessionKey = async (config: LastFMOptions) => {
   // Get and store the session key
   const data = {
     api_key: config.api_key,
@@ -78,18 +85,25 @@ const getAndSetSessionKey = async (config) => {
     token: config.token,
   };
   const apiSignature = createApiSig(data, config.secret);
-  let res = await net.fetch(`${config.api_root}${createQueryString(data, apiSignature)}`);
-  res = await res.json();
-  if (res.error) {
-    await authenticate(config);
+  const response = await net.fetch(`${config.api_root}${createQueryString(data, apiSignature)}`);
+  const json = await response.json() as {
+    error?: string,
+      session?: {
+        key: string,
+      }
+  };
+  if (json.error) {
+    config.token = await authenticateAndGetToken(config);
+    setOptions('last-fm', config);
+  }
+  if (json.session) {
+    config.session_key = json?.session?.key;
+    setOptions('last-fm', config);
   }
-
-  config.session_key = res?.session?.key;
-  setOptions('last-fm', config);
   return config;
 };
 
-const postSongDataToAPI = async (songInfo, config, data) => {
+const postSongDataToAPI = async (songInfo: SongInfo, config: LastFMOptions, data: LastFmData) => {
   // This sends a post request to the api, and adds the common data
   if (!config.session_key) {
     await getAndSetSessionKey(config);
@@ -101,6 +115,7 @@ const postSongDataToAPI = async (songInfo, config, data) => {
     artist: songInfo.artist,
     ...(songInfo.album ? { album: songInfo.album } : undefined), // Will be undefined if current song is a video
     api_key: config.api_key,
+    api_sig: '',
     sk: config.session_key,
     format: 'json',
     ...data,
@@ -108,26 +123,32 @@ const postSongDataToAPI = async (songInfo, config, data) => {
 
   postData.api_sig = createApiSig(postData, config.secret);
   net.fetch('https://ws.audioscrobbler.com/2.0/', { method: 'POST', body: createFormData(postData) })
-    .catch((error) => {
-      if (error.response.data.error === 9) {
+    .catch(async (error: {
+      response?: {
+        data?: {
+          error: number,
+        }
+      }
+    }) => {
+      if (error?.response?.data?.error === 9) {
         // Session key is invalid, so remove it from the config and reauthenticate
         config.session_key = undefined;
+        config.token = await authenticateAndGetToken(config);
         setOptions('last-fm', config);
-        authenticate(config);
       }
     });
 };
 
-const addScrobble = (songInfo, config) => {
+const addScrobble = (songInfo: SongInfo, config: LastFMOptions) => {
   // This adds one scrobbled song to last.fm
   const data = {
     method: 'track.scrobble',
-    timestamp: Math.trunc((Date.now() - songInfo.elapsedSeconds) / 1000),
+    timestamp: Math.trunc((Date.now() - (songInfo.elapsedSeconds ?? 0)) / 1000),
   };
   postSongDataToAPI(songInfo, config, data);
 };
 
-const setNowPlaying = (songInfo, config) => {
+const setNowPlaying = (songInfo: SongInfo, config: LastFMOptions) => {
   // This sets the now playing status in last.fm
   const data = {
     method: 'track.updateNowPlaying',
@@ -136,9 +157,9 @@ const setNowPlaying = (songInfo, config) => {
 };
 
 // This will store the timeout that will trigger addScrobble
-let scrobbleTimer;
+let scrobbleTimer: NodeJS.Timeout | undefined;
 
-const lastfm = async (_win, config) => {
+const lastfm = async (_win: BrowserWindow, config: LastFMOptions) => {
   if (!config.api_root) {
     // Settings are not present, creating them with the default values
     config = defaultConfig.plugins['last-fm'];
@@ -156,11 +177,11 @@ const lastfm = async (_win, config) => {
     clearTimeout(scrobbleTimer);
     if (!songInfo.isPaused) {
       setNowPlaying(songInfo, config);
-      // Scrobble when the song is half way through, or has passed the 4 minute mark
+      // Scrobble when the song is halfway through, or has passed the 4-minute mark
       const scrobbleTime = Math.min(Math.ceil(songInfo.songDuration / 2), 4 * 60);
-      if (scrobbleTime > songInfo.elapsedSeconds) {
+      if (scrobbleTime > (songInfo.elapsedSeconds ?? 0)) {
         // Scrobble still needs to happen
-        const timeToWait = (scrobbleTime - songInfo.elapsedSeconds) * 1000;
+        const timeToWait = (scrobbleTime - (songInfo.elapsedSeconds ?? 0)) * 1000;
         scrobbleTimer = setTimeout(addScrobble, timeToWait, songInfo, config);
       }
     }
diff --git a/plugins/lyrics-genius/back.js b/plugins/lyrics-genius/back.ts
similarity index 65%
rename from plugins/lyrics-genius/back.js
rename to plugins/lyrics-genius/back.ts
index 1913c193..b443b2fb 100644
--- a/plugins/lyrics-genius/back.js
+++ b/plugins/lyrics-genius/back.ts
@@ -1,36 +1,43 @@
-const { join } = require('node:path');
+import { join } from 'node:path';
 
-const { ipcMain, net } = require('electron');
-const is = require('electron-is');
-const { convert } = require('html-to-text');
+import { BrowserWindow, ipcMain, net } from 'electron';
+import is from 'electron-is';
+import { convert } from 'html-to-text';
 
-const { cleanupName } = require('../../providers/song-info');
-const { injectCSS } = require('../utils');
+import { GetGeniusLyric } from './types';
+
+import { cleanupName, SongInfo } from '../../providers/song-info';
+
+import { injectCSS } from '../utils';
+import config from '../../config';
 
 const eastAsianChars = /\p{Script=Katakana}|\p{Script=Hiragana}|\p{Script=Hangul}|\p{Script=Han}/u;
 let revRomanized = false;
 
-module.exports = async (win, options) => {
+const LyricGeniusTypeObj = config.get('plugins.lyric-genius');
+export type LyricGeniusType = typeof LyricGeniusTypeObj;
+
+export default (win: BrowserWindow, options: LyricGeniusType) => {
   if (options.romanizedLyrics) {
     revRomanized = true;
   }
 
   injectCSS(win.webContents, join(__dirname, 'style.css'));
 
-  ipcMain.on('search-genius-lyrics', async (event, extractedSongInfo) => {
-    const metadata = JSON.parse(extractedSongInfo);
-    event.returnValue = await fetchFromGenius(metadata);
+  ipcMain.handle('search-genius-lyrics', async (_, extractedSongInfo: string) => {
+    const metadata = JSON.parse(extractedSongInfo) as SongInfo;
+    return await fetchFromGenius(metadata);
   });
 };
 
-const toggleRomanized = () => {
+export const toggleRomanized = () => {
   revRomanized = !revRomanized;
 };
 
-const fetchFromGenius = async (metadata) => {
+export const fetchFromGenius = async (metadata: SongInfo) => {
   const songTitle = `${cleanupName(metadata.title)}`;
   const songArtist = `${cleanupName(metadata.artist)}`;
-  let lyrics;
+  let lyrics: string | null;
 
   /* Uses Regex to test the title and artist first for said characters if romanization is enabled. Otherwise normal
   Genius Lyrics behavior is observed.
@@ -46,7 +53,7 @@ const fetchFromGenius = async (metadata) => {
   /* If the romanization toggle is on, and we did not detect any characters in the title or artist, we do a check
   for characters in the lyrics themselves. If this check proves true, we search for Romanized lyrics.
   */
-  if (revRomanized && !hasAsianChars && eastAsianChars.test(lyrics)) {
+  if (revRomanized && !hasAsianChars && lyrics && eastAsianChars.test(lyrics)) {
     lyrics = await getLyricsList(`${songArtist} ${songTitle} Romanized`);
   }
 
@@ -58,7 +65,7 @@ const fetchFromGenius = async (metadata) => {
  * @param {*} queryString
  * @returns The lyrics of the first song found using the Genius-Lyrics API
  */
-const getLyricsList = async (queryString) => {
+const getLyricsList = async (queryString: string): Promise<string | null> => {
   const response = await net.fetch(
     `https://genius.com/api/search/multi?per_page=5&q=${encodeURIComponent(queryString)}`,
   );
@@ -69,17 +76,17 @@ const getLyricsList = async (queryString) => {
   /* Fetch the first URL with the api, giving a collection of song results.
   Pick the first song, parsing the json given by the API.
   */
-  const info = await response.json();
-  let url = '';
-  try {
-    url = info.response.sections.find((section) => section.type === 'song')
-      .hits[0].result.url;
-  } catch {
+  const info = await response.json() as GetGeniusLyric;
+  const url = info
+    .response
+    .sections
+    .find((section) => section.type === 'song')?.hits[0].result.url;
+
+  if (url) {
+    return await getLyrics(url);
+  } else {
     return null;
   }
-
-  const lyrics = await getLyrics(url);
-  return lyrics;
 };
 
 /**
@@ -87,7 +94,7 @@ const getLyricsList = async (queryString) => {
  * @param {*} url
  * @returns The lyrics of the song URL provided, null if none
  */
-const getLyrics = async (url) => {
+const getLyrics = async (url: string): Promise<string | null> => {
   const response = await net.fetch(url);
   if (!response.ok) {
     return null;
@@ -116,6 +123,3 @@ const getLyrics = async (url) => {
     },
   });
 };
-
-module.exports.toggleRomanized = toggleRomanized;
-module.exports.fetchFromGenius = fetchFromGenius;
diff --git a/plugins/lyrics-genius/front.js b/plugins/lyrics-genius/front.ts
similarity index 63%
rename from plugins/lyrics-genius/front.js
rename to plugins/lyrics-genius/front.ts
index b7d0bf7b..c87daf23 100644
--- a/plugins/lyrics-genius/front.js
+++ b/plugins/lyrics-genius/front.ts
@@ -1,8 +1,8 @@
-const { ipcRenderer } = require('electron');
-const is = require('electron-is');
+import { ipcRenderer } from 'electron';
+import is from 'electron-is';
 
-module.exports = () => {
-  ipcRenderer.on('update-song-info', (_, extractedSongInfo) => setTimeout(() => {
+export default () => {
+  ipcRenderer.on('update-song-info', (_, extractedSongInfo: string) => setTimeout(async () => {
     const tabList = document.querySelectorAll('tp-yt-paper-tab');
     const tabs = {
       upNext: tabList[0],
@@ -17,10 +17,10 @@ module.exports = () => {
 
     let hasLyrics = true;
 
-    const lyrics = ipcRenderer.sendSync(
+    const lyrics = await ipcRenderer.invoke(
       'search-genius-lyrics',
       extractedSongInfo,
-    );
+    ) as string;
     if (!lyrics) {
       // Delete previous lyrics if tab is open and couldn't get new lyrics
       checkLyricsContainer(() => {
@@ -40,17 +40,21 @@ module.exports = () => {
 
     checkLyricsContainer();
 
-    tabs.lyrics.addEventListener('click', () => {
+    const lyricsTabHandler = () => {
       const tabContainer = document.querySelector('ytmusic-tab-renderer');
-      const observer = new MutationObserver((_, observer) => {
-        checkLyricsContainer(() => observer.disconnect());
-      });
-      observer.observe(tabContainer, {
-        attributes: true,
-        childList: true,
-        subtree: true,
-      });
-    });
+      if (tabContainer) {
+        const observer = new MutationObserver((_, observer) => {
+          checkLyricsContainer(() => observer.disconnect());
+        });
+        observer.observe(tabContainer, {
+          attributes: true,
+          childList: true,
+          subtree: true,
+        });
+      }
+    };
+
+    tabs.lyrics.addEventListener('click', lyricsTabHandler);
 
     function checkLyricsContainer(callback = () => {
     }) {
@@ -63,7 +67,7 @@ module.exports = () => {
       }
     }
 
-    function setLyrics(lyricsContainer) {
+    function setLyrics(lyricsContainer: Element) {
       lyricsContainer.innerHTML = `<div id="contents" class="style-scope ytmusic-section-list-renderer description ytmusic-description-shelf-renderer genius-lyrics">
       ${
         hasLyrics
@@ -74,15 +78,20 @@ module.exports = () => {
         </div>
         <yt-formatted-string class="footer style-scope ytmusic-description-shelf-renderer" style="align-self: baseline"></yt-formatted-string>`;
       if (hasLyrics) {
-        lyricsContainer.querySelector('.footer').textContent = 'Source: Genius';
-        enableLyricsTab();
+        const footer = lyricsContainer.querySelector('.footer');
+        if (footer) {
+          footer.textContent = 'Source: Genius';
+          enableLyricsTab();
+        }
       }
     }
 
-    function setTabsOnclick(callback) {
+    const defaultHandler = () => {};
+
+    function setTabsOnclick(callback: EventListenerOrEventListenerObject | undefined) {
       for (const tab of [tabs.upNext, tabs.discover]) {
         if (tab) {
-          tab.addEventListener('click', callback);
+          tab.addEventListener('click', callback ?? defaultHandler);
         }
       }
     }
diff --git a/plugins/lyrics-genius/menu.js b/plugins/lyrics-genius/menu.js
deleted file mode 100644
index 1c771cbe..00000000
--- a/plugins/lyrics-genius/menu.js
+++ /dev/null
@@ -1,16 +0,0 @@
-const { toggleRomanized } = require('./back');
-
-const { setOptions } = require('../../config/plugins');
-
-module.exports = (win, options) => [
-  {
-    label: 'Romanized Lyrics',
-    type: 'checkbox',
-    checked: options.romanizedLyrics,
-    click(item) {
-      options.romanizedLyrics = item.checked;
-      setOptions('lyrics-genius', options);
-      toggleRomanized();
-    },
-  },
-];
diff --git a/plugins/lyrics-genius/menu.ts b/plugins/lyrics-genius/menu.ts
new file mode 100644
index 00000000..6dc6cd70
--- /dev/null
+++ b/plugins/lyrics-genius/menu.ts
@@ -0,0 +1,18 @@
+import { BrowserWindow, MenuItem } from 'electron';
+
+import { LyricGeniusType, toggleRomanized } from './back';
+
+import { setOptions } from '../../config/plugins';
+
+module.exports = (win: BrowserWindow, options: LyricGeniusType) => [
+  {
+    label: 'Romanized Lyrics',
+    type: 'checkbox',
+    checked: options.romanizedLyrics,
+    click(item: MenuItem) {
+      options.romanizedLyrics = item.checked;
+      setOptions('lyrics-genius', options);
+      toggleRomanized();
+    },
+  },
+];
diff --git a/plugins/lyrics-genius/types.ts b/plugins/lyrics-genius/types.ts
new file mode 100644
index 00000000..fac46ada
--- /dev/null
+++ b/plugins/lyrics-genius/types.ts
@@ -0,0 +1,121 @@
+export interface GetGeniusLyric {
+  meta: Meta;
+  response: Response;
+}
+
+export interface Meta {
+  status: number;
+}
+
+export interface Response {
+  sections: Section[];
+}
+
+export interface Section {
+  type: string;
+  hits: Hit[];
+}
+
+export interface Hit {
+  highlights: Highlight[];
+  index: Index;
+  type: Index;
+  result: Result;
+}
+
+export interface Highlight {
+  property: string;
+  value: string;
+  snippet: boolean;
+  ranges: Range[];
+}
+
+export interface Range {
+  start: number;
+  end: number;
+}
+
+export enum Index {
+  Album = 'album',
+  Lyric = 'lyric',
+  Song = 'song',
+}
+
+export interface Result {
+  _type: Index;
+  annotation_count?: number;
+  api_path: string;
+  artist_names?: string;
+  full_title: string;
+  header_image_thumbnail_url?: string;
+  header_image_url?: string;
+  id: number;
+  instrumental?: boolean;
+  lyrics_owner_id?: number;
+  lyrics_state?: LyricsState;
+  lyrics_updated_at?: number;
+  path?: string;
+  pyongs_count?: number | null;
+  relationships_index_url?: string;
+  release_date_components: ReleaseDateComponents;
+  release_date_for_display: string;
+  release_date_with_abbreviated_month_for_display?: string;
+  song_art_image_thumbnail_url?: string;
+  song_art_image_url?: string;
+  stats?: Stats;
+  title?: string;
+  title_with_featured?: string;
+  updated_by_human_at?: number;
+  url: string;
+  featured_artists?: string[];
+  primary_artist?: Artist;
+  cover_art_thumbnail_url?: string;
+  cover_art_url?: string;
+  name?: string;
+  name_with_artist?: string;
+  artist?: Artist;
+}
+
+export interface Artist {
+  _type: Type;
+  api_path: string;
+  header_image_url: string;
+  id: number;
+  image_url: string;
+  index_character: IndexCharacter;
+  is_meme_verified: boolean;
+  is_verified: boolean;
+  name: string;
+  slug: string;
+  url: string;
+  iq?: number;
+}
+
+// TODO: Add more types
+export enum Type {
+  Artist = 'artist',
+}
+
+// TODO: Add more index characters
+export enum IndexCharacter {
+  G = 'g',
+  Y = 'y',
+}
+
+// TODO: Add more states
+export enum LyricsState {
+  Complete = 'complete',
+}
+
+export interface ReleaseDateComponents {
+  year: number;
+  month: number;
+  day: number | null;
+}
+
+export interface Stats {
+  unreviewed_annotations: number;
+  concurrents?: number;
+  hot: boolean;
+  pageviews?: number;
+}
diff --git a/plugins/tuna-obs/back.ts b/plugins/tuna-obs/back.ts
index 8df6fd98..76c26997 100644
--- a/plugins/tuna-obs/back.ts
+++ b/plugins/tuna-obs/back.ts
@@ -61,7 +61,7 @@ module.exports = (win: BrowserWindow) => {
     }
 
     data.duration = secToMilisec(songInfo.songDuration);
-    data.progress = secToMilisec(songInfo.elapsedSeconds);
+    data.progress = secToMilisec(songInfo.elapsedSeconds ?? 0);
     data.cover = songInfo.imageSrc ?? '';
     data.cover_url = songInfo.imageSrc ?? '';
     data.album_url = songInfo.imageSrc ?? '';
diff --git a/providers/song-info-front.ts b/providers/song-info-front.ts
index 9e51aa20..602d6d49 100644
--- a/providers/song-info-front.ts
+++ b/providers/song-info-front.ts
@@ -7,9 +7,10 @@ import { YoutubePlayer } from '../types/youtube-player';
 import { GetState } from '../types/datahost-get-state';
 
 let songInfo: SongInfo = {} as SongInfo;
+export const getSongInfo = () => songInfo;
 
 const $ = <E extends HTMLElement>(s: string): E => document.querySelector(s) as E;
-const $$ = <E extends HTMLElement>(s: string): E[] => [...document.querySelectorAll(s)!] as E[];
+const $$ = <E extends HTMLElement>(s: string): E[] => Array.from(document.querySelectorAll(s));
 
 ipcRenderer.on('update-song-info', async (_, extractedSongInfo: string) => {
   songInfo = JSON.parse(extractedSongInfo) as SongInfo;
diff --git a/providers/song-info.ts b/providers/song-info.ts
index 486daef9..4ffc1110 100644
--- a/providers/song-info.ts
+++ b/providers/song-info.ts
@@ -9,16 +9,16 @@ export interface SongInfo {
   title: string;
   artist: string;
   views: number;
-  uploadDate: string;
+  uploadDate?: string;
   imageSrc?: string | null;
   image?: Electron.NativeImage | null;
   isPaused?: boolean;
   songDuration: number;
-  elapsedSeconds: number;
-  url: string;
+  elapsedSeconds?: number;
+  url?: string;
   album?: string | null;
   videoId: string;
-  playlistId: string;
+  playlistId?: string;
 }
 
 // Fill songInfo with empty values
diff --git a/tsconfig.json b/tsconfig.json
index d4d53dcd..18fce570 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "target": "ESNext",
-    "lib": ["dom"],
+    "lib": ["dom", "es2022"],
     "module": "CommonJS",
     "allowSyntheticDefaultImports": true,
     "esModuleInterop": true,