Can I install Firefox Add-Ons?
Lockfox Secure Browser While you can install a Firefox extension and use it, when you close Lockfox Secure Browser, the extension will be deleted. This is due to the very portable nature of Lockfox, and how it deletes all traces from being left behind. In the next version of Lockfox, we are considering adding a way to keep loaded extensions. If you wish to use your current extensions and add-ons, consider using the Lockfox Add-On for Firefox.