734311 - Setting tabs min-width (X#)pixels or higher, causes Tab Overflow scroll-buttons to appear when they shouldn't

Status: RESOLVED DUPLICATE of bug 734273

(Firefox :: Tabbed Browser, defect)

Description

[rob64rock]

Attachment: Tab Overflow scroll-buttons appear when they shouldn't.png

User Agent: Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20120308 Firefox/13.0a1
Build ID: 20120308031058

Steps to reproduce:

Using WinXp 32bit with fresh install 20120308 Firefox Nightly 13.0a1 Cset: 2f6368ca605e with new Fx profile. Screen Resolution set to 1024 x 768 on non-wide screen monitor.

Steps to Reproduce:

1.) I installed Stylish 1.2.6
2.) Created New Blank style with this CSS code below:

.tabbrowser-tabs .tabbrowser-tab[selected="true"]:not([pinned="true"]) {
   min-width: 152px !important; } /* set min-width to 152px or higher */

3.) Restarted Browser



Actual results:

After Browser Restart, having(min-width to 152px or higher) causes Tab overflow scroll-buttons to appear when they shouldn't. They don't disappear until I open a lot of tabs, then close them.

Screenshot:
http://i39.tinypic.com/vzipmp.png


Expected results:

The Tab overflow scroll-buttons shouldn't appear, when there aren't enough tabs for Fx tab overflow mode to be enabled.

Note: This problem doesn't occurring on latest Win32 Fx Beta, Aurora builds or Nightly builds prior to 20120308.

Alice0775, suggested it maybe being caused due to Bug 716334 recently landing on Nightly channel.

Comment 1

[rob64rock]

Note: During additional testing on a fresh 20120308 Firefox Nightly install with new Fx profile, I could constantly reproduce the bug with min-width set between (175px <-> 300px), and sometimes could reproduce the bug when having the min-width set between (152px <-> 174px) only after a Browser Restart.

Revised Steps to reproduce:

1.) Using WinXp 32bit with fresh install 20120308 Firefox Nightly 13.0a1 Cset: 2f6368ca605e with new Fx profile. You may need to set your Screen Resolution to 1024 x 768(Not sure if it's a factor).

2.) Load/Open only a few of tabs(3 or less, at least 1), not completely filling the Tabbar.

3.) Installed Stylish 1.2.6

4.) Created New Blank style with this CSS code below:

.tabbrowser-tabs .tabbrowser-tab[selected="true"]:not([pinned="true"]) {
   min-width: 250px !important; } /* Test with min-width between 175px or higher */

5.) Then Restarted Browser

Comment 2

[:Felipe Gomes (needinfo for replies!)]

rob64rock: did you remove the dependency on bug 716334 by accident or on purpose?

Comment 3

[rob64rock]

(In reply to Felipe Gomes (:felipe) from comment #2)
> rob64rock: did you remove the dependency on bug 716334 by accident or on
> purpose?

accident

Comment 4

[rob64rock]

Felipe Gomes (:felipe) We almost had another mid-air collision when posting..lol..

Do you think this bug 734311 may be a duplicate of bug 734273 or Vice Versa?

Comment 5

[:Felipe Gomes (needinfo for replies!)]

Rob: yeah I think they're probably duplicates, but I haven't had a chance to look closely into it yet so I re-marked the dependency to not lose track.

Comment 6

[rob64rock]

(In reply to Felipe Gomes (:felipe) from comment #5)
> Rob: yeah I think they're probably duplicates, but I haven't had a chance to
> look closely into it yet so I re-marked the dependency to not lose track.

The OP of bug 734273, didn't mention if he/she was modify the tabs min-width using CSS. That's why wasn't sure if was a duplicate or not, either way both bugs are regressions related to bug 716334 landing.