2016802 - Slack has two overlapping scrollbars: one is a dark gray rectangle, the other is light gray with rounded ends

Status: NEW

(Core :: Widget, defect)

Description

[Chris Peterson [:cpeterson]]

Attachment: Firefox_screenshot.png

Steps to reproduce

1. Log into Slack in Firefox.
2. Mouse over the scrollbar in Slack's channel list.
3. Then increase your page zoom using Ctrl or Cmd and +.

Expected result

The scrollbar should either be a solid color or not shown if the mouse pointer is not hover over the scrollable element (like in Chrome and Safari).

Actual result

There are two overlapping scrollbars: one is a dark gray rectangle, the other is light gray with rounded ends. See the attached screenshot. Zooming the page causes the two scrollbars to move apart.

I can reproduce in Firefox on both Windows and macOS.

This bug is not a regression. I can reproduce in the oldest Firefox version that Slack still allows, Firefox 131 (2024-10-01).

Comment 1

[Chris Peterson [:cpeterson]]

Attachment: Chrome_screenshot.png

Chrome screenshot

Comment 2

[Timothy Nikkel (:tnikkel)]

Seems like a dupe of bug 2016775 ? Filed a few hours before.