1823418 - Scrollbars show through to GMail Context menus

Status: RESOLVED DUPLICATE of bug 1827337

(Core :: Layout: Scrolling and Overflow, defect)

Description

[Mike Kaply [:mkaply]]

Attachment: Screenshot on Windows

On Windows and macOS, if the left sidebar rail in gmail has a scroll bar, it shows through the context menu displayed in gmail.

This doesn't happen in Chrome.

Comment 1

[Mike Kaply [:mkaply]]

Attachment: Problem on macOS

Comment 2

[Alice0775 White]

On Windows11, I can reproduce this issue.
And the problem is gone if setting widget.windows.overlay-scrollbars.enabled to false.

On Ubuntu20.04, I can also reproduce this.
And the problem is gone if setting widget.gtk.overlay-scrollbars.enabled to false.

Comment 3

[Alice0775 White]

Regression window on Windows11:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=3f8699724d492a8f00f7ad8d26b16c71236c311e&tochange=21553c91b278c428b4c8e861602a99fb1c1acc70

Comment 4

[Sky Schubert [:skyschub]]

I ran mozregression on macOS, and can reproduce this on a 2022-04-04 build (20220404231805). On macOS, this only happens with overlay scrollbars, not "always visible" scrollbars. The regressor in comment 3 is correct as it seems to enable overlay scrollbars on Windows. but the issue itself is not new.

Comment 5

[Alice0775 White]

Regression window on Ubuntu20.04:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=5e8914a02c20197917b5632a0d99cfaf9bc2e5ef&tochange=06e62c0f0b870617216e239b35fa88f1afda6b71

Comment 6

[Timothy Nikkel (:tnikkel)]

There is probably an existing issue on the z order of scrollbars but I can't find it right now, I know what change needs to be made, just need to read the history of the code to make sure it is correct and there is nothing depending on it.

Comment 7

[Botond Ballo [:botond]]

(In reply to Timothy Nikkel (:tnikkel) from comment #6)

There is probably an existing issue on the z order of scrollbars but I can't find it right now

I think the bug you're looking for is bug 1803910.

Comment 8

[Timothy Nikkel (:tnikkel)]

Should be fixed now on nightly. Can you confirm?

Comment 9

[Mike Kaply [:mkaply]]

Yep, it's fixed.