Examine source code of InvisiWeb

{
  "manifest_version": 2,
  "name": "InvisiWeb",
  "version": "1.1",
  "description": "Surf Unseen",
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "webNavigation",
    "storage",
    "unlimitedStorage",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "InvisiWeb",
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "web_accessible_resources": [
    "blocked.html",
    "blocked.js",
    "blocked.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{485ee270-d5ac-4d72-b91f-5407af9aee9f}"
    }
  }
}