1637021 - .tab-throbber animation is broken in some cases

Status: RESOLVED DUPLICATE of bug 1394241

(Firefox :: Theme, defect)

Description

[Yaron]

Attachment: Throbber.png

User Agent: Mozilla/5.0 (Windows NT 6.1; rv:76.0) Gecko/20100101 Firefox/76.0

Steps to reproduce:

My screen resolution is 1360x768.
Tested with Firefox RTL (Hebrew). New Profile.

Maximize Firefox or set the window width to 1232 (default, in xulstore.json).
Open 8 tabs.
Activate the seventh tab.
Open any page.

Actual results:

The .tab-throbber animation is split/broken: 1px is on the right and 4px are on the left.

With different resolution/window-width the issue is reproducible with different number of tabs.

Comment 1

[Firefox Bug Husbandry Bot]

Because this bug's Severity is normal and has not been changed, and this bug's priority is -- (none,) indicating it has has not been previously triaged, the bug's Severity is being updated to -- (default, untriaged.)

Comment 2

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

The severity field is not set for this bug.
:dao, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 3

[Dão Gottwald [:dao]]

Yaron, could you help find a regression range using mozregression?

Comment 4

[Cristian Fogel [:cfogel]]

Trying to reproduce the issue, but everything seems to work as intended.
Attempted on a MacBookPro and a Win10 pc but the animation appears to be working fine with both 76.0 and more recent builds.

@Yaron could you provide some additional information regarding your PC-setup as well?

Comment 5

[Yaron]

Attachment: aboutSupport.txt

Comment 6

[Yaron]

Dão,
I've never used mozregression. Sorry.

Itiel,
Could you please have a look?

Cristian,
I've attached aboutSupport.txt.

Comment 7

[Itiel]

Hm, dupe of bug 1637021?

Comment 8

[Dão Gottwald [:dao]]

(In reply to Itiel from comment #7)

Hm, dupe of bug 1637021?

That's this bug.

Comment 9

[Itiel]

(In reply to Dão Gottwald [::dao] from comment #8)

(In reply to Itiel from comment #7)

Hm, dupe of bug 1637021?

That's this bug.

Sigh. I meant bug 1394241.

Comment 11

[Yaron]

Itiel,
Great. Thank you.