Examine source code of Page Hacker

{
  "manifest_version": 2,
  "name": "Page Hacker",
  "version": "3.4",
  "author": "nico@nc",
  "description": "__MSG_extensionDescription__",
  "icons": {
    "48": "icons/ph-icon-48.png",
    "96": "icons/ph-icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "pagehacker-nico@nc",
      "strict_min_version": "115.0"
    }
  },
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/ph-icon.svg",
    "default_title": "Page Hacker"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+F2"
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle",
      "js": [
        "ph.js"
      ]
    }
  ],
  "default_locale": "en",
  "web_accessible_resources": [
    "phbar.html",
    "fontello/*",
    "icons/ph-icon.svg"
  ]
}