Examine source code of Kayako Helper

{
  "manifest_version": 2,
  "name": "Kayako Helper",
  "description": "Copy Kayako Ticket ID",
  "version": "0.2.1",
  "author": "Artyom Babiy",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "Copy Kayako Ticket ID"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Shift+Alt+K"
      },
      "description": "Copy Kayako Ticket ID"
    }
  },
  "permissions": [
    "menus",
    "storage",
    "tabs",
    "clipboardWrite",
    "notifications"
  ]
}