Examine source code of Find Your Tab

{
  "manifest_version": 2,
  "name": "Find Your Tab",
  "description": "A browser add-on to help you find a tab easier",
  "version": "1.1resigned1",
  "homepage_url": "https://github.com/begeeben/find-your-tab",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_title": "Tabs, tabs, tabs",
    "default_popup": "tabs.html",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png"
    }
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "96": "icon96.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f0603fb1-7a48-4fdb-ab78-591d909df92a}"
    }
  }
}