Examine source code of granslate

{
  "manifest_version": 2,
  "name": "granslate",
  "version": "2.0",
  "description": "translate on the fly.",
  "homepage_url": "https://github.com/Husam-Omar/granslate",
  "author": "Icon made by Freepik from www.flaticon.com",
  "permissions": [
    "*://translate.googleapis.com/*",
    "*://*/*",
    "activeTab",
    "contextMenus",
    "clipboardWrite",
    "tabs"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "icons": {
    "32": "icons/icon-32.png",
    "64": "icons/icon-64.png"
  }
}