I have recently started using Ubuntu 25.04. Firefox browser works fine at first. After some amount of time, however, Firefox starts not working properly. The address bar and some icons on the toolbar (for example, "going back page", "going forward page", Reload button, the 'X' close button on each tab, the star mark, the "open application menu" button) become NOT clickable.
Interestingly, the webpages work fine even in this situation. I can still change the tabs (by clicking them or 'Ctrl+tab') and have no problems to see the contents of the webpages. The bookmark bar also works. But once I open a new tab, I can't close it because of the problem I described above.
The only solution I found is to close the current Firefox session (= the whole tabs in the problematic Firefox window) and just open a new Firefox session (new Firefox window) which is not the best solution.
Do you happen to know about this Firefox issue and how I could solve this issue?