404529 - Tab bar left scroller arrow shows when only two pages exists

Status: VERIFIED INVALID

(Firefox :: Tabbed Browser, defect)

Description

[Andrés Delfino]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9b2pre) Gecko/2007112003 Minefield/3.0b2pre
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9b2pre) Gecko/2007112003 Minefield/3.0b2pre

Tab bar left scroller arrow shows when only two pages exists, having enough space for both.

Reproducible: Always

Steps to Reproduce:
Make sure you have "Always show tab bar" disabled (default).

1. Open a new tab.
Actual Results:  
The left arrow scroller shows up (disabled).

Expected Results:  
No scroller to see; since there is (almost always) space. Obviously, this would change in certain occasions (when there is no space).

Comment 1

[Andrés Delfino]

Just realized that both, left and right scroller, are shown.

Comment 2

[Marco Bonardo [:mak]]

i can't see that... do you have some extension for tab management?

Comment 3

[Andrés Delfino]

No, a recently installed (< 12 hours) build. New profile, no extensions at all. It is less than 2 seconds, maybe you have a faster machine than mine :P Would a screen video help?

Comment 4

[Bob Uliss]

Tested on a MAC using OS X v10.5.2 - 
No scrollers are shown 
Did you mean:
page navigation arrows - go forward/backward one page.

Comment 5

[Andrés Delfino]

(In reply to comment #4)
> Tested on a MAC using OS X v10.5.2 - 
> No scrollers are shown 
> Did you mean:
> page navigation arrows - go forward/backward one page.
> 

Hmm, no; I'll just mark it INVALID, since I don't see it now.

Comment 6

[Henrique Gusso]

This happens to me, in Firefox 3 final, but maybe not like it happened to Andrés Delfino. I figured out how to reproduce the bug after some trials:

1. Open Firefox 3
2. Leave only 1 tab opened, making sure you have "Always show tab bar" disabled
3. Load a website, any site that takes a a few seconds to load, and while it's still loading, open a new tab using cmd+T

This will make 2 scroll arrows show, one in the left and one in the right of the tab bar, really quickly, like a blink, and then they will disappear. They don't show when opening a new tab while the single page is fully loaded, only when it's still loading.

Reproduced using Mac OS X v10.5.3 and v10.5.4
- Mac Mini
- 1.83 GHz Intel Core 2 Duo
- 1GB 667 MHz DDR2 SDRAM

Reproduced this bug using "Safe mode", disabling every extension, it still happened. And I don't use any tab related extensions anyway.