Bug 427213

Summary: Konqueror Firefox Chromium (all installed from deb) and plasma apps look very differently themed.
Product: [Plasma] plasma-integration Reporter: new.featureengineer
Component: generalAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED DOWNSTREAM    
Severity: normal CC: fella
Priority: NOR    
Version First Reported In: 5.18.5   
Target Milestone: ---   
Platform: Mint (Ubuntu based)   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: screenshot
screenshot2

Description new.featureengineer 2020-10-01 16:55:22 UTC
Created attachment 132049 [details]
screenshot

SUMMARY


STEPS TO REPRODUCE
1. Use Layan global theme (Selects Breeze application theme)
2. Use Layan gtk theme
3. Open Firefox, Konqueror, Chromium and a plasma app (e.g. Spectacle) for comparison, load a webpage on all browsers.

OBSERVED RESULT
Spectacle looks as the application theme would suggest.
Firefox's windows color is OK, menu highlights are incorrect, scrollbar shape is ok, but like menu highlights, the color is incorrect. 

Konqueror's window color is OK, menu highlights are correct, but scrollbar shape and color are worse than Firefox's - way different than expected.

Chromium's windows color is wrong, and so are the menus and the scrollbar is identical to that of Konqueror - again way different than expected.


EXPECTED RESULT

Atleast KDE applications should look OK... I know gtk theme consistency is problematic, but when gtk themed applications look better than KDE applications in some areas (e.g. that scrollbar) - you know something is wrong.

Interestingly, before loading any webpage on Konqueror, the scrollbars look as expected. It's only after loading a webpage that the wrong scrollbars are shown.


SOFTWARE/OS VERSIONS

Linux/KDE Plasma: Mint 20 (5.4.0-48-generic) / Plasma 5.18.5
KDE Plasma Version: Plasma 5.18.5
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8

ADDITIONAL INFORMATION

Added screenshots.
Comment 1 new.featureengineer 2020-10-01 16:56:03 UTC
Created attachment 132050 [details]
screenshot2
Comment 2 Tobias Fella 2026-02-16 12:53:02 UTC
How apps look with a third-party theme - especially when comparing apps in different toolkits - is not really a bug in plasma.