I’ve just recently switched because Chrome yet again stuffed up all my task bar shortcuts (whatsapp, keep, calenders etc) so they all just loaded as tabs.

Firefox doesn’t even have the ability to create task bar icons so for a long time I never bothered with it.

Found this extension which mostly gives that functionality. Not perfect as I have to share the URL links to the main instance to view them in a separate tab, but it’s ok. https://addons.mozilla.org/en-US/firefox/addon/pwas-for-firefox/