Examine source code of EasyTime for Firefox

{
  "manifest_version": 3,
  "name": "EasyTime for Firefox",
  "version": "0.4.3",
  "homepage_url": "https://techtime.co.nz/display/TECHTIME/EasyTime",
  "description": "Automatically record time as you work, and make it easy to review your day.",
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "options_ui": {
    "page": "html/options.html",
    "open_in_tab": true
  },
  "permissions": [
    "alarms",
    "history",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_icon": "./icons/techtime-icon.png",
    "default_title": "EasyTime"
  },
  "icons": {
    "16": "./icons/techtime-icon.png",
    "36": "./icons/techtime-icon.png",
    "48": "./icons/easytime-logo.png",
    "120": "./icons/easytime-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "easytime@techtime.co.nz"
    }
  }
}