Examine source code of Shiftr

{
  "manifest_version": 2,
  "name": "Shiftr",
  "version": "1.0.0",
  "description": "Profile switcher for Firefox — switch, create, rename, and manage profiles with a click or shortcut.",
  "icons": {
    "48": "icons/icon-ext-48.svg",
    "96": "icons/icon-ext-96.svg"
  },
  "permissions": [
    "nativeMessaging",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/icon-48.svg",
    "default_popup": "popup/popup.html",
    "default_title": "Shiftr — Switch Profile"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "switch-profile": {
      "suggested_key": {
        "default": "Alt+Shift+P",
        "mac": "Alt+Shift+P"
      },
      "description": "Open Shiftr"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "shiftr@local",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}