Examine source code of YouTube Dislike Count – Icon Safe

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.3.0",
  "description": "__MSG_extensionDescription__",
  "default_locale": "de",
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "permissions": [
    "storage",
    "https://www.youtube.com/*",
    "https://m.youtube.com/*",
    "https://returnyoutubedislikeapi.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*",
        "https://m.youtube.com/*"
      ],
      "exclude_matches": [
        "https://music.youtube.com/*"
      ],
      "run_at": "document_idle",
      "css": [
        "content.css"
      ],
      "js": [
        "settings.js",
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "settings.js",
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_title": "__MSG_toolbarTitle__",
    "default_popup": "popup.html",
    "default_icon": "icons/icon.svg",
    "default_area": "navbar"
  },
  "options_ui": {
    "page": "popup.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-dislike-count-icon-safe@playground.local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ]
      }
    }
  }
}