Examine source code of Tab Title Logger

{
  "manifest_version": 2,
  "name": "Tab Title Logger",
  "version": "1.0",
  "description": "Logs the titles of all open tabs to the console.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Log Tab Titles"
  },
  "permissions": [
    "tabs",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2d51b71e-e06e-4570-a878-20c80999ec85}"
    }
  }
}