Examine source code of Comma Subs

{
  "name": "Comma Subs",
  "version": "1.3.0",
  "manifest_version": 3,
  "description": "Watch videos with community made subtitles.",
  "icons": {
    "16": "icons/icon-16.png",
    "24": "icons/icon-24.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png",
    "256": "icons/icon-256.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "24": "icons/icon-24.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png"
    },
    "default_popup": "content/popup.html"
  },
  "options_ui": {
    "page": "content/options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "content/scripts/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://berriz.in/*"
      ],
      "js": [
        "content/scripts/berriz.js"
      ],
      "css": [
        "content/scripts/berriz.css"
      ]
    },
    {
      "matches": [
        "https://kick.com/*"
      ],
      "js": [
        "content/scripts/kick.js"
      ]
    },
    {
      "matches": [
        "https://www.twitch.tv/*",
        "https://m.twitch.tv/*"
      ],
      "js": [
        "content/scripts/twitch.js"
      ]
    },
    {
      "matches": [
        "https://www.youtube.com/*",
        "https://m.youtube.com/*"
      ],
      "js": [
        "content/scripts/youtube.js"
      ]
    },
    {
      "matches": [
        "https://weverse.io/*",
        "https://m.weverse.io/*"
      ],
      "js": [
        "content/scripts/weverse.js"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "homepage_url": "https://www.commasubs.com",
  "browser_specific_settings": {
    "gecko": {
      "id": "commasubs@example.com",
      "strict_min_version": "109.0"
    },
    "gecko_android": {
      "strict_min_version": "113.0"
    }
  }
}