Examine source code of DomainPro

{
  "manifest_version": 2,
  "name": "DomainPro",
  "version": "1.0",
  "description": "Domain-specific search tool with advanced features",
  "icons": {
    "48": "icons/domainpro-48.png",
    "96": "icons/domainpro-96.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "<all_urls>",
    "webRequest",
    "webRequestBlocking"
  ],
  "browser_action": {
    "default_icon": "icons/domainpro-48.png",
    "default_title": "DomainPro",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6f9f65bb-1a56-447d-9643-132e7dec268b}"
    }
  }
}