[Bug]: Browser Crash on selecting "Use QT" in Appearance Settings

[Slayr]

Operating system

Linux

Version

Version 0.7.9.1 (Official Build, Chromium 143.0.7499.169) appimage (64-bit)

Have you tested that this is not an upstream issue or an issue with your configuration?

• I have tried reproducing this issue in Chrome and it could not be reproduced there
• I have tried reproducing this issue in ungoogled-chromium and it could not be reproduced there
• I have tried reproducing this issue in Helium with a new and empty profile using --user-data-dir command line argument and it could not be reproduced there

Description

Browser Crash on selecting "Use QT" in Appearance Settings when using Appimage in Fedora 43 GNOME

How to Reproduce?

1. Go to helium://settings/
2. Click "Use QT" in Appearance Settings

Actual behavior

The instance hangs and a prompt saying the App has crashed appears.

Expected behavior

Change theme to QT

Additional context

fedora:~$ /home/User/AppImages/helium.appimage
QSocketNotifier: Can only be used with threads started with QThread
QColor::fromRgbF: Alpha parameter out of range
QColor::fromRgbF: Alpha parameter out of range
QColor::fromRgbF: Alpha parameter out of range
QColor::fromRgbF: Alpha parameter out of range
QColor::fromRgbF: Alpha parameter out of range
[106170:106170:0112/093754.105805:ERROR:content/browser/browser_main_loop.cc:290] GLib-GObject: cannot register existing type 'GtkWidget'
[106170:106170:0112/093754.105820:ERROR:content/browser/browser_main_loop.cc:290] GLib-GObject: cannot add class private field to invalid type ''
[106170:106170:0112/093754.105823:ERROR:content/browser/browser_main_loop.cc:290] GLib-GObject: cannot add private field to invalid (non-instantiatable) type ''
[106170:106170:0112/093754.105827:ERROR:content/browser/browser_main_loop.cc:290] GLib-GObject: g_type_add_interface_static: assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed
[106170:106170:0112/093754.105831:ERROR:content/browser/browser_main_loop.cc:290] GLib-GObject: cannot register existing type 'GtkBuildable'
[106170:106170:0112/093754.105834:ERROR:content/browser/browser_main_loop.cc:290] GLib-GObject: g_type_interface_add_prerequisite: assertion 'G_TYPE_IS_INTERFACE (interface_type)' failed
[106170:106170:0112/093754.105837:ERROR:content/browser/browser_main_loop.cc:290] GLib: g_once_init_leave: assertion 'result != 0' failed
[106170:106170:0112/093754.105840:ERROR:content/browser/browser_main_loop.cc:290] GLib-GObject: g_type_add_interface_static: assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed
[106170:106170:0112/093754.105842:ERROR:content/browser/browser_main_loop.cc:290] GLib-GObject: g_type_register_static: assertion 'parent_type > 0' failed
[106170:106170:0112/093754.105846:ERROR:content/browser/browser_main_loop.cc:290] GLib-GObject: cannot add private field to invalid (non-instantiatable) type ''

[thaiiko]

I cannot reproduce this on my machine. This should also should probably be on the https://github.com/imputnet/helium-linux repo

…

On Sun, Jan 11, 2026 at 10:07 PM Rishi ***@***.***> wrote: *Slayr* created an issue (imputnet/helium-linux#171) <#171> Operating system Linux Version Version 0.7.9.1 (Official Build, Chromium 143.0.7499.169) appimage (64-bit) Have you tested that this is not an upstream issue or an issue with your configuration? - I have tried reproducing this issue in Chrome and it could not be reproduced there - I have tried reproducing this issue in ungoogled-chromium and it could not be reproduced there - I have tried reproducing this issue in Helium with a new and empty profile using --user-data-dir command line argument and it could not be reproduced there Description Browser Crash on selecting "Use QT" in Appearance Settings when using Appimage in Fedora 43 GNOME How to Reproduce? 1. Go to helium://settings/ 2. Click "Use QT" in Appearance Settings Actual behavior The instance hangs and a prompt saying the App has crashed appears. Expected behavior Change theme to QT Additional context *No response* — Reply to this email directly, view it on GitHub <#171>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BJ57U373SJQMVWMITPA7XGT4GMMX3AVCNFSM6AAAAACRL5QT5CVHI2DSMVQWIX3LMV43ASLTON2WKOZTHAYDENRZGE3TOOA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>