Same here. see screenshot But, I figured out that it was 2 tabs with spotify causing the issue for unknown reasons. Once I closed those tabs, the issue went away and browser is working normally. I had a lot of windows with a lot of tabs, so it took a minute to figure out.

I am running firefox on mint-001-1.0 with 3 pin tabs and ~7 other tabs in one window. Any tab with dynamic update (eg NOAA radar) is prone to initiating a crash but more often works fine. When a crash occurs, firefox is unresponsive & I force a shutdown; most often it restarts fine but not always. When restart fails, ps -ef | grep firefox shows multiple processes still running so I have to kill the initial firefox process to restart. I did not see these crashes before Feb 2025. I check Update Manager daily and run updates as soon as I see them.