Examine source code of Custom ColorFX

{
  "manifest_version": 2,
  "name": "TabMaster Pro",
  "version": "1.0",
  "description": "Boost Your Productivity with Tab Management",
  "icons": {
    "48": "logo.png"
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{72353fcc-3260-4679-b759-753e1112100f}"
    }
  }
}