683905 - Pinned app tabs are mis-aligned

Status: RESOLVED INVALID

(Firefox :: Tabbed Browser, defect)

Description

[Greg Noe]

Attachment: firefoxbug.png

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0) Gecko/20100101 Firefox/7.0
Build ID: 20110824172139

Steps to reproduce:

Created some pinned tabs, upgraded to v.7, did regular browsing.


Actual results:

My three pinned tabs moved mysteriously to the left after a bit of regular browsing (see attachment), cutting off half of the first one and leaving a gap between the third pinned tab and the first regular tab. This can be fixed temporarily by modifying any of the pinned tabs in any way (creating, destroying, moving).


Expected results:

App tabs should appear normal, fully visible.

Comment 1

[Dão Gottwald [:dao]]

Can you reliably reproduce this?

Comment 2

[Greg Noe]

I've been trying to nail down exactly what action causes it (one of those things you don't seem to notice until you need a pinned tab), so will continue to reproduce passively and try to figure it out.

Comment 3

[Greg Noe]

Attachment: Before bug 1

Comment 4

[Greg Noe]

Attachment: Before bug 2

Comment 5

[Greg Noe]

Attachment: After bug

Comment 6

[Greg Noe]

I figured out how to break it consistently:

1. Start with at least one pinned tab.
2. Create more regular tabs, they will be created with a default width.
3. When another tab is created that its default width would put it beyond the visible region of the tab bar, the pinned tabs are shoved over as if they're making room for it, and then the non-pinned tabs re-adjust their width, but the pinned tabs are still too far to the left.

Weirdly, the tabs will re-adjust their width once, but not a second time.

I've attached multiple pictures to illustrate.

Comment 7

[Dão Gottwald [:dao]]

(In reply to Greg Noe from comment #6)
> I figured out how to break it consistently:
> 
> 1. Start with at least one pinned tab.
> 2. Create more regular tabs, they will be created with a default width.
> 3. When another tab is created that its default width would put it beyond
> the visible region of the tab bar, the pinned tabs are shoved over as if
> they're making room for it, and then the non-pinned tabs re-adjust their
> width, but the pinned tabs are still too far to the left.

I can't reproduce this, using today's nightly (9.0) on Win XP and 7.

Comment 8

[Greg Noe]

I updated to build 20110902161802 for version 7.0 and this appears to be fixed, I'll reopen if it comes up again. Thanks.