Examine source code of BrowserToys

{
  "manifest_version": 2,
  "name": "BrowserToys",
  "browser-specific-settings": {
    "gecko": {
      "id": "browsertoys@siddhantattavar.com"
    }
  },
  "description": "Provides various browser scripts",
  "version": "1.3.2",
  "permissions": [],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*",
        "https://music.youtube.com/*"
      ],
      "js": [
        "autoconfirm.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_icon": "icon.svg",
    "default_title": "BrowserToys"
  },
  "icons": {
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{49feb7bb-df50-472c-8bc3-49e4d6b20933}"
    }
  }
}