Examine source code of Google Analytics Blocker

{
  "description": "Block Google Analytics from any website you visit.",
  "homepage_url": "https://github.com/davidpob99/webextensions",
  "manifest_version": 2,
  "author": "David Población",
  "name": "Google Analytics Blocker",
  "permissions": [
    "management",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "storage"
  ],
  "icons": {
    "128": "icons/icon.svg"
  },
  "version": "1.2.2",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon.svg"
  },
  "applications": {
    "gecko": {
      "id": "{c7c3483c-0e96-45f4-8772-f84462cdc047}"
    }
  }
}