Examine source code of Ahrefs Traffic Checker

{
  "manifest_version": 2,
  "name": "Ahrefs Traffic Checker",
  "version": "1.0",
  "description": "Quick traffic check using Ahrefs",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{86817826-1f15-4ac1-9d53-0f13368a91ef}"
    }
  }
}