Examine source code of facebook.tracking.exposed

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "short_name": "FbTREX",
  "description": "__MSG_extensionDescription__",
  "version": "2.1.2",
  "version_name": "2.1.2",
  "author": "Alberto Granzotto, Claudio Agosti, and the contributors in https://github.com/tracking-exposed/web-extension",
  "default_locale": "en",
  "icons": {
    "16": "images/trex-logo-16.png",
    "48": "images/trex-logo-48.png",
    "128": "images/trex-logo-128.png"
  },
  "permissions": [
    "storage",
    "cookies",
    "https://*.facebook.com/"
  ],
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background/bundle.js"
    ]
  },
  "browser_action": {
    "default_popup": "default_popup/index.html",
    "default_icon": {
      "16": "images/trex-logo-16.png",
      "32": "images/trex-logo-32.png",
      "48": "images/trex-logo-48.png",
      "64": "images/trex-logo-64.png",
      "128": "images/trex-logo-128.png",
      "256": "images/trex-logo-256.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.facebook.com/*"
      ],
      "js": [
        "browser-polyfill.js",
        "content_scripts/facebook.com/bundle.js"
      ],
      "css": [
        "styles/theme/main.css",
        "content_scripts/facebook.com/bundle.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "*.png",
    "*.svg",
    "*.eot",
    "*.woff",
    "*.svg",
    "*.ttf"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a6e6d9fd-020e-47a3-94e2-77e38a37b603}",
      "strict_min_version": "57.0"
    }
  }
}