Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More
This thread was closed and archived. Please ask a new question if you need help.
Solved Locked Archived

How to use system GTK3 theme in Firefox 102 ESR?

Firefox Settings
SuMo Bot replied
SuMo Bot
SuMo Bot

Setting `widget.non-native-theme.enabled` to false no longer works; I still get Firefox's default styling for controls and widgets.

I use a custom GTK3 theme in my environment that I want to apply to Firefox. The above setting works in 91 ESR, and broke with the upgrade to 102 ESR.

A custom user chrome stylesheet would be too painful.

Note: You can revert page styling to defaults in View -> Page Style -> No Style.

102.1.0esr, Debian testing, Xfce 4.16

Setting `widget.non-native-theme.enabled` to false no longer works; I still get Firefox's default styling for controls and widgets. I use a custom GTK3 theme in my environment that I want to apply to Firefox. The above setting works in 91 ESR, and broke with the upgrade to 102 ESR. A custom user chrome stylesheet would be too painful. Note: You can revert page styling to defaults in View -> Page Style -> No Style. 102.1.0esr, Debian testing, Xfce 4.16

All Replies (2)

cor-el
cor-el
  • Moderator

Chosen Solution

See the discussion in this bug report.

  • 1749645 - Various scrollbar drawing and theme clean-ups.

(please do not comment in bug reports
https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)

Modified by cor-el

SuMo Bot
SuMo Bot Question owner

Interesting. Maybe it was deprecated for the better.

I was thinking of Firefox adapting styles from the GTK theme CSS file to their own browser styles, or something like that.

So I guess for now it's a no.

SuMo Bot
SuMo Bot Question owner

This question has been locked because the original author has deleted their account. While you can no longer post new replies, the existing content remains available for reference.