Examine source code of Tabhunterer

{
  "author": "SpitFire-666",
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "icons/martini-16x16.png",
      "24": "icons/martini-24x24.png",
      "32": "icons/martini-32x32.png"
    },
    "default_title": "TabHunterer",
    "default_popup": "popup/tabhunter.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "mac": "MacCtrl+Shift+Space",
        "windows": "Ctrl+Shift+Space",
        "linux": "Ctrl+5"
      }
    }
  },
  "default_locale": "en",
  "description": "Find tabs fast. Fork of Tabhunter.",
  "developer": {
    "name": "Spitfire-666",
    "url": "https://github.com/SpitFire-666"
  },
  "homepage_url": "https://github.com/SpitFire-666",
  "icons": {
    "48": "icons/th-48x48.png",
    "96": "icons/th-96x96.png",
    "128": "icons/th-128x128.png"
  },
  "manifest_version": 2,
  "name": "Tabhunterer",
  "options_ui": {
    "browser_style": true,
    "page": "popup/prefs.html"
  },
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "storage",
    "tabs",
    "bookmarks",
    "<all_urls>"
  ],
  "short_name": "TabHunterer",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{583f017b-31ac-4a17-8550-f5bf797ee040}"
    }
  }
}