Examine source code of FireTana

{
  "name": "FireTana",
  "author": "Michele Tagliabue",
  "description": "Redirects Bing search elsewhere",
  "version": "1.1resigned1",
  "manifest_version": 2,
  "icons": {
    "25": "images/icon25.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "*://www.bing.com/*",
    "*://www.google.com/*",
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_icon": {
      "20": "images/icon20.png",
      "40": "images/icon40.png"
    },
    "default_title": "EdgeTana",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.bing.com/*"
      ],
      "js": [
        "js/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2169dd6b-d58e-4d1a-937a-90a6cdfe95ad}"
    }
  }
}