XPI-file available to install manually?

Is there a way to use a (XPI-) file to install the add-on for Firefox?
How can I obtain this file?
https://www.accessfirefox.org/Install\_Addon\_Manually.php

Anyone who knows if this file is available?

SPG Dirkx said:

Anyone who knows if this file is available?

https://addons.mozilla.org/firefox/downloads/file/890920/katalon_recorder_selenium_ide_for_firefox_55-3.4.4-an+fx-windows.xpi?src=search

Simply copy the URL from the add to firefox button from the extension library…

Thanks!