Created attachment 144156 [details] showing the issue in question, firefox gtk csd on the bottom and dolphin on the top SUMMARY Minor aesthetic bug with breeze-gtk theme, mismatch (it matches the old defaults, not the new ones) STEPS TO REPRODUCE 1. Open Firefox (or any CSD GTK app) on a decently new version of KDE 2. Turn off title bar 3. Observe close button does not match current breeze defaults. OBSERVED RESULT Incongruence between close button on the GTK CSD app and the rest of the system titlebars EXPECTED RESULT Expected it would look the same on both SOFTWARE/OS VERSIONS Linux: 5.15.5 (OpenSUSE Tumbleweed) (available in About System) KDE Plasma Version: 5.23.3 KDE Frameworks Version: 5.88.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION Here are a couple screenshots. It appears that three svg files need to be updated. breeze-gtk/src/assets/breeze-close-active-symbolic.svg breeze-gtk/src/assets/breeze-close-hover-symbolic.svg breeze-gtk/src/assets/breeze-close.svg On further investigation, it appears this issue was "solved" in over a year ago by a script that changes the Breeze GTK theme depending on whether the circle is drawn around the title bar... I don't know if this is related, maybe it's not picking this up? https://bugs.kde.org/show_bug.cgi?id=414113
Sorry, my bad. I reused my home directory and removing the old files solved the issue. Also fixed a crash with SystemSettings, sorry for wasting your time.