Did you try Firefox in [https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#search104 Troubleshoot Mode]? X11 or Wayland? Try another desktop. Try downloading Firefox from Mozilla, run '''firefox-bin''' from the folder and see if you have the same issue. https://www.mozilla.org/en-US/firefox/all/#product-desktop-release Operating System: openSUSE Tumbleweed 20240328 KDE Plasma Version: 6.0.3 KDE Frameworks Version: 6.0.0 Qt Version: 6.6.3 Kernel Version: 6.8.1-1-default (64-bit) Graphics Platform: X11 Processors: 16 × AMD Ryzen 7 5825U with Radeon Graphics Memory: 62.1 GiB of RAM Graphics Processor: AMD Radeon Graphics Manufacturer: HP Product Name: HP ProBook 455 15.6 inch G9 Notebook PC

See: *[/questions/1443412] Hold-Key-To_Repeat function (and other keyboard oddities) in Gmail and Discover.com