Examine source code of Simply Translator

{
  "description": "Translate Website and Files",
  "manifest_version": 2,
  "name": "SimplyTranslator",
  "version": "4.1.0",
  "icons": {
    "32": "icons/icon-32.png",
    "64": "icons/icon-64.png"
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "storage"
  ],
  "homepage_url": "https://github.com/3Samourai/SimplyTranslator/",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/icon-32.png",
    "default_title": "SimplyTranslator",
    "default_popup": "popup/Translator.html"
  }
}