Examine source code of Zip domain blocker

{
  "manifest_version": 2,
  "name": "Zip domain blocker",
  "version": "0.0.1",
  "author": "Pontus Henriksson",
  "description": "This extension promotes online security by blocking access to potentially risky .zip domains.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "48": "media/logo.png"
    },
    "default_popup": "popup.html",
    "default_title": "Zip domain blocker"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{efd188a1-afcc-4f04-b4ad-1ecd1926646c}"
    }
  }
}