Examine source code of xBeGone

{
  "manifest_version": 2,
  "name": "xBeGone",
  "version": "1.3",
  "description": "Automatically replaces URLs containing https://fxtwitter.com with https://fxtwitter.com when copied.",
  "permissions": [
    "clipboardRead",
    "clipboardWrite",
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/16.png",
      "48": "icons/48.png",
      "128": "icons/128.png"
    }
  },
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{76baf4a3-c037-4d79-9f3e-317f13a63b40}"
    }
  }
}