[Bug]: Icons (favicons, bookmarks, avatar) appear pixelated with fractional scaling on Wayland/GNOME 49

[ReynkeDeVos]

Operating system

Linux, GNOME 49, Wayland

Version

0.6.7.1

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

• In Chrome it could not be reproduced there
• In ungoogled-chromium it could not be reproduced there
• In Helium with --user-data-dir=$(mktemp -d) I have the same pixelation issue.

Description

Favicons in the tab bar, bookmark icons, and certain UI elements appear pixelated.

Edit:

This bug only occurs on monitors WITH fractional scaling enabled!
gsettings set org.gnome.mutter experimental-features "['scale-monitor-framebuffer']"

How to Reproduce?

1. Open Helium on a monitor with fractional scaling (125%, 133%, 150%, ...)
2. Observe the icons in the tab bar or bookmarks bar. Notice the pixelation.
3. Hover the mouse cursor over a pixelated icon.
4. Observe that the icon becomes sharp/unpixelated. Favicons in the tab stay pixelated, even when mouseover.

Expected behavior

Icons should render sharply at all times without requiring a mouse hover.

Additional context

• This issue also occurred in the prior Helium version (0.6.4.1)
• The issue persists with the default 2-row top-bar layout and the cat-ui.

Screenshot

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Videos

Bookmarks / Favicons

Show video

Bookmarks.mp4

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Avatar Icon

Show video

Avatar_icon.mp4

[ReynkeDeVos]

Update: The pixelation issue persists in Helium 0.6.9.1.

I can also confirm this affects the re-enabled GTK buttons introduced in commit 4a95606b.