Examine source code of Enigma Blocker

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "2.1.3",
  "description": "__MSG_extensionDescription__",
  "default_locale": "de",
  "author": "krayzen@gmx.de",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    },
    "default_title": "__MSG_extensionName__",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "lib/i18n.js",
      "lib/filter-engine.js",
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "lib/i18n.js",
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    },
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://youtube.com/*",
        "*://*.youtube-nocookie.com/*",
        "*://youtu.be/*",
        "*://*.youtu.be/*"
      ],
      "js": [
        "youtube.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "tabs",
    "contextMenus",
    "notifications",
    "<all_urls>"
  ],
  "web_accessible_resources": [
    "youtube-page.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "enigma-blocker@krayzen.gmx.de",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}