Examine source code of Youtube Language Filter

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "0.10",
  "description": "__MSG_extensionDescription__",
  "icons": {
    "48": "src/assets/icon.svg",
    "96": "src/assets/icon.svg"
  },
  "default_locale": "en",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "src/content/main.js",
        "src/content/selectors.js",
        "src/utils/debug.js"
      ],
      "css": [
        "src/utils/debug.css"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "src/assets/icon.svg",
    "default_title": "Youtube Language Filter",
    "default_popup": "src/popup/popup.html"
  },
  "incognito": "spanning",
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-language-filter@osmo.zip",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}