Examine source code of Invidify

{
  "name": "Invidify",
  "version": "0.0.8",
  "manifest_version": 2,
  "description": "Transforms links on YouTube pages to point to Invidify instance.",
  "homepage_url": "https://github.com/szabojanos90/Invidify",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "Invidify",
    "default_popup": "index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://*.youtube.hu/*",
        "*://*.youtube-nocookie.com/*",
        "*://*.youtu.be/*"
      ],
      "js": [
        "contentScript.bundle.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "options_ui": {
    "page": "index.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@invidify.com",
      "strict_min_version": "42.0"
    }
  }
}