1606322 - [MacOS] [Debugger] Horizontal scrolling doesn't work (glitchy) when breakpoints are added

Status: UNCONFIRMED

(DevTools :: Debugger, defect, P3)

Description

[Luchezar Petkov]

Attachment: Screen Recording 2019-12-30 at 16.35.01.mov

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:72.0) Gecko/20100101 Firefox/72.0

Steps to reproduce:

Firefox Developer Edition 72.0b10 (64-bit)
MacOS 10.15.2

1. Inspected a page
2. Docked the Developer Tools to the right
3. Started the debugger
4. Added a breakpoint
5. Scrolled horizontally

Actual results:

Horizontal scrolling doesn't work properly (either with the trackpad or by dragging the scrollbar), is glitchy, part of the window frame blinks. See the attached video recording.

Expected results:

Should have scrolled horizontally to reveal the hidden content (source code + returned values of functions and variables)

Comment 1

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

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 2

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

The priority flag is not set for this bug.
:jlast, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 3

[Jan Honza Odvarko [:Honza] (always need-info? me)]

Just a quick comment: this seems to be related to the inline preview.