Subject: Firefox 153 scrollbar behavior change feedback

se23xx — Fri, 24 Jul 2026 03:20:31 GMT

Hello Firefox team,

I would like to share my feedback about the scrollbar behavior change introduced in Firefox 153.

After this update, some websites that use webkit scrollbar CSS rules behave differently in Firefox. Previously, these websites displayed overlay scrollbars, but now some of them show a separate scrollbar area with an additional line next to the scrollbar.

I understand that the goal of this change is to improve compatibility with websites designed for Chromium-based browsers. However, this also changes the visual experience for Firefox users.

Many users may prefer the previous overlay scrollbar behavior. The new behavior can make some websites look less clean and inconsistent compared to previous Firefox versions.

Could you consider adding a preference that allows users to disable this compatibility behavior and keep the previous scrollbar behavior?

I appreciate the work done to improve web compatibility, but giving users more control over this change would be a better solution.

Thank you for your work on Firefox.

Best regards

Re: Subject: Firefox 153 scrollbar behavior change feedback

wrtr — Tue, 28 Jul 2026 11:12:30 GMT

Agree. This is a very bad bandage patch. As a web app developer, this css scrollbar change causes issues in visual use in firefox web app visuals that people had just gotten used to, while not actually supporting the Chromium-based browsers or ::-webkit-scrollbar css options. It does neither. Either support the standard CSS, or support both it and the ::-webkit-scrollbar css options. But to just turn off overlay without giving any of the options for developers to fix things after it's turned off, based on css meant for other browsers and not firefox is just... well... bad.

We like firefox, we like you, we'd like people to use it. This change causes cracks in firefox usage. Choose one road or the other. But choose. Much thanks. This seems like a bad unneeded AI created change, put in to support....other browser's code? Scratches head. If you don't support ::-webkit-scrollbar css options then just not support it and support/force standard css. Or support ::-webkit-scrollbar css options. A bandage that breaks your code to not really support other browser's code is bad... Why turn off overlay when seeing another browser's css code? As Marge Simpson would say...hrrrrrrmmmmm...

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Subject: Firefox 153 scrollbar behavior change feedback

Re: Subject: Firefox 153 scrollbar behavior change feedback