Examine source code of 5g icon

{
  "manifest_version": 2,
  "name": "5g icon",
  "version": "1.0",
  "description": "The 5G symbol represents the 5th generation mobile network – high speed, low latency, supporting multiple devices connected simultaneously.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Click me!"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c4d2c80c-b7c8-42cc-ab98-2e3c7f0b83ab}"
    }
  }
}