Honestly I switched away from the Firefox snap as it was just not running that great. I can't remember exactly how but google will help, basically uninstall firefox snap and install it from another source (I used the gnome software centre but I guess that's not available on kbuntu - might be another though).
Alright I finally got rid of Chrome and I'm using the pure untouched Firefox. At first my post hung when trying to post, so I turned off the tracking protection and then it worked. Firefox is a good browser, at least on desktop.