Examine source code of YouTube Pro AdBlocker

{
  "manifest_version": 2,
  "name": "YouTube AdBlocker Pro",
  "version": "1.0.1",
  "description": "Blocks all YouTube ads and includes a control panel with Pro features.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "48": "icon.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{76e785b9-3676-47c5-bdc0-f187e9d72650}"
    }
  }
}