Created attachment 148078 [details]
floating firefox tooltips

SUMMARY
If you switch from a running firefox instance to another virtual desktop using screen edge(overview or present windows) tooltips of firefox tabs and toolbar will float on the switched virtual desktop

STEPS TO REPRODUCE
1. Set screen edges toggle to overview or present windows all desktops
2. Open firefox and a different app, put each of them on different virtual desktop. 
3. Switch to firefox as your active window
4. Activate screen edge
5. For overview, enter a virtual desktop where firefox is not running
6. For present windows all desktops switch to the app that was on a different virtual desktop
OBSERVED RESULT
You will see firefox tab or toolbar tooltips floating on your virtual desktop

EXPECTED RESULT
No floating tooltips should be on virtual desktop

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Opensuse Tumbleweed
(available in About System)
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION