Examine source code of Quick Translate

{
  "manifest_version": 2,
  "name": "Quick Translate",
  "version": "1.0",
  "description": "Select text on any webpage, choose a language, and get an instant translation. Copy the translated text to the clipboard with a pastel-themed interface.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b6469fee-fe99-4062-bd80-d36673d0c844}"
    }
  }
}