1830023 - Endless scroll which disappear after opening devtools

Status: UNCONFIRMED

(Core :: Layout: Tables, defect)

Description

[piotr.piechowicz]

Attachment: Infinite scroll.mp4

Steps to reproduce:

Open a page with table with sticky positioned headers.

Actual results:

On my website I have table with sticky columns, the table has unnecessary scroll which i can scroll endlessly, hovewer when i open devtools the scroll disappears.

Expected results:

There shouldnt be a scroll, definately not infiite one. It should behave as with the devtools opened

Comment 1

[Emilio Cobos Álvarez [:emilio]]

Any chance you could attach or link to a page that reproduces the issue?

Comment 2

[Emilio Cobos Álvarez [:emilio]]

This seems similar to bug 1598112, but that was fixed long time ago.

Comment 3

[piotr.piechowicz]

Attachment: Reproduction

Okay i found the way to reproduce this bug, in attached site there are elements with className "hidden-width-calculator", they are positioned absolute inside div with position relative which is inside sticky positioned div, i guess this is the problem. Even if you delete theese elements in inspector (or as we do delete them by js) the problem persists, however if i dont render them at all the problem is not occuring.

Comment 4

[David Shin[:dshin]]

Attachment: First stab at reduced test case

Comment 5

[Daniel Bodea [:danibodea]]

I've attempted to reproduce this issue by loading the test case provided in step 4 (and the HTML page in comment 3), then opening the DevTools (F12), but it did not cause the horizontal scroll to disappear even after focusing all DevTools tabs. It was tested in Nightly v115.0a1, Beta v114.0b9, Release v113.0a1 and ESR v102.11.0esr on Windows 10.

I can't determine the cause of this issue, but it appears to depend on something on your system or user profile.

Can you retest it using safe mode? (https://www.wikihow.com/Start-Firefox-in-Safe-Mode)
If it still occurs in safe mode, can you try a new profile? (https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles)

Thank you for your contribution!

Comment 6

[piotr.piechowicz]

Right now I cannot reproduce devtools correcting the error, the problem with endless scroll still persists.