Examine source code of Mistype switcher

{
  "manifest_version": 2,
  "name": "Mistype switcher",
  "version": "1.0.2",
  "description": "Switch accidentally written in English text into Hebrew and vice versa.",
  "homepage_url": "https://github.com/amitDavid/mistype_language_switcher",
  "icons": {
    "16": "icons/switcher.svg",
    "32": "icons/switcher.svg",
    "48": "icons/switcher.svg",
    "64": "icons/switcher.svg",
    "96": "icons/switcher.svg"
  },
  "permissions": [
    "menus",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "js/contextMenu.js"
    ]
  }
}