Examine source code of Cybercat

{
  "name": "Cybercat",
  "description": "Dynamic Bookmarks",
  "version": "1.0.1",
  "manifest_version": 2,
  "icons": {
    "128": "./icon-128.png"
  },
  "background": {
    "scripts": [
      "./background.js"
    ]
  },
  "options_page": "./options.html",
  "browser_action": {
    "default_popup": "./options.html"
  },
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "*://www.google.com/*",
    "*://duckduckgo.com/*",
    "*://www.bing.com/*",
    "*://search.yahoo.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "cybercat@anonymous",
      "strict_min_version": "130.0"
    }
  }
}