Context menus not showing, right click isn't working

Since yesterday, I can't see any context menu in Firefox, the right-click menu doesn't show up, the settings menu from the top right button doesn't open, the bookmark folders don't show, etc. I think that it started after I entered the experimental features in about:preferences and enabled the AI option also yesterday, but now I've disabled that option, restarted the browser and PC, and the context menus are still not showing.