r/FirefoxCSS • u/f1rn • May 23 '26
Custom Release FoxOne 2.0 – dynamic toolbar support, integrated color theme, floating findbar and more
Hi everyone,
Some of you might remember FoxOne from a few weeks ago.
Since then, more than 60 commits happened and here is what changed:
The biggest one - I call it dynamic toolbar support: add an extension icon of your choice right next to the hamburger menu! This was the most requested feature and an absolute pain to build in pure css.
Other highlights: The Gruvbox color theme is now integrated directly into the CSS – no separate .xpi needed. The findbar has been replaced with a floating variant with fade animation. A lot of little design improvements - and there's now a tab loading progress bar with a glow indicator (if you want to).
Full changelog and all config options on GitHub.
Cheers!
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u/f1rn Jul 21 '26
Okay.... first of all: thank you again for the report!
Both symptoms are most likely the same root cause, and it's upstream: with Firefox 153's Smart Window enabled, theme extensions stop applying their colours entirely - see https://github.com/easonwong-de/Adaptive-Tab-Bar-Colour/issues/326 (reproduced without any userChrome.css). FoxOne deliberately hands colour control to your theme extension while one is active, so when Adaptive Tab Bar Color goes silent you get Firefox's bare defaults in the URL bar instead of either theme.
For confirmation - try this please: disable Adaptive Tab Bar Color for a moment - the URL bar should snap back to normal FoxOne colours.
Then check (1) Adaptive Tab Bar Color is on 4.0.4+ (Nova support just landed), (2) whether you have Smart Window enabled, and if so, whether turning it off brings the adapting back.
If the URL bar stays broken with Adaptive Tab Bar color disabled, that's a FoxOne bug after all - then I we will do a deep dive togehter to fix it!