1946690 - Scroll position of the HTML and CSS pane returns to the top after switching tools

Status: RESOLVED FIXED

(DevTools :: Inspector, defect)

Description

[6k64x4ma]

Attachment: screenshot.webp

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0

Steps to reproduce:

1. Open the Inspector.
2. Scroll down in the HTML and CSS panes.
3. Switch to another tool (e.g. Console).
4. Switch back to the Inspector.

Actual results:

• The scroll position of the HTML and CSS pane returns to the top.
• Sometimes there are blank space at the top of the pane, please see the screenshot.

Expected results:

• The scroll position should be preserved.

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=8aec7b1b4272d50e21928ba57fff57af1909a778&tochange=8e8305f85074074769f6d51a556f210132f2c25b

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

:hiro, since you are the author of the regressor, bug 1803713, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 2

[Hiroyuki Ikezoe (:hiro)]

Thanks for reporting. Interestingly I can't reproduce this issue on local debug builds, which means it's hard to investigate. :/

Comment 3

[Hiroyuki Ikezoe (:hiro)]

I can't reproduce on local opt builds either. :/

Comment 4

[Hiroyuki Ikezoe (:hiro)]

Looks like either bug 1943351 or bug 1943543 fixed this issue.

6k64x4ma, would you mind trying a latest nightly to see if the issue still is reproducible or not? Thanks!

There might be an underlying issue in our paint skipping code, of course.

Comment 5

[6k64x4ma]

It seems that one of those two fixes fixed this bug.
Thank you for checking this!

Comment 6

[Hiroyuki Ikezoe (:hiro)]

Thank you!

Comment 7

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1803713