Examine source code of FastFinderWeb

{
  "manifest_version": 2,
  "name": "FastFinderWeb",
  "version": "0.5.1resigned1",
  "description": "Display an interactive summary for webpage. Navigate easier thanks to this extension",
  "permissions": [
    "activeTab",
    "<all_urls>"
  ],
  "sidebar_action": {
    "browser_style": true,
    "default_title": "FastFinderWeb",
    "default_panel": "index.html",
    "default_icon": "icon/images.jpg"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Alt+O"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a2f4b3e5-b520-4c9a-8f46-f8a2ce507b12}"
    }
  }
}