417686 - Cannot scroll to bottom of tab list menu with LOTS of tabs open

Status: RESOLVED INCOMPLETE

(Firefox :: Tabbed Browser, defect)

Description

[Steve Rooke]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9b3) Gecko/2008020513 Firefox/3.0b3
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9b3) Gecko/2008020513 Firefox/3.0b3

Three windows open, first with 94 tabs, second with 37 tabs and third with 9 tabs. Attempts to open the tab menu in the first window and scroll to the bottom result in the menu restoring itself back to the start before any entry can be selected. The pointer is placed on the down-arrow box at the bottom of the list, the list starts to scroll downward but then immediately re-scrolls back to the starting position. 

Reproducible: Always

Steps to Reproduce:
1. Open three windows.
2. Open number of tabs as detailed above.
3. Click on 'List all tabs' button in window 1.
4. Move pointer to down-arrow button at bottom of list.
Actual Results:  
The list starts to scroll downwards but then immediately scrolls back to the starting position.

Expected Results:  
The list should scroll to allow selection of entries which are beyond the bottom of the list.

This is a MOSTLY happens problem for me BUT sometimes it does work as expected.

Comment 1

[Steve Rooke]

Firefox 3 b3

Comment 2

[Kevin Hunter]

Two thoughts:

1. This bug may now be obsolete, as I'm able to scroll to the bottom of a long list of tabs with the described action of clicking on the down arrow.

2. This may be related: I *can* recreate this if I attempt to scroll the list with the mouse-wheel.  Or, in my case, the side of my touchpad.  The behavior is exactly as Steve described, modulo side-of-touchpad vs click-on-down-arrow catalyst.

Software stack:
$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 8.10
Release:	8.10
Codename:	intrepid

$ uname -a
Linux hani 2.6.27-9-generic #1 SMP Thu Nov 20 22:15:32 UTC 2008 x86_64 GNU/Linux

$ firefox --version   # Ubuntu's version, not a stock Mozilla version.
Mozilla Firefox 3.0.5, Copyright (c) 1998 - 2008 mozilla.org

Comment 3

[Wayne Mery (:wsmwk)]

Steve, Kevin, do you sitll see this?

works for me with scroll mouse
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.2.7) Gecko/20100713 Firefox/3.6.7 (.NET CLR 3.5.30729)

Comment 4

[Kevin Hunter]

Yes with Ubuntu's version, not when I test with a stock 3.6.8 from Mozilla.  From here, I suggest that as far as Mozilla is concerned this is fixed.  Hopefully the fix finds its way into Maverick.

Comment 5

[Steve Rooke]

This seems, or certainly seemed, to happen when the list is scrolled by a scroll-wheel or the down arrow when the list was not fully completed, as when the system is heavily loaded, and once it occurs, the list will/would not scroll down without snapping back to the top. I'm currently running 3.6.3 and cannot reproduce it at the moment as I'm running a 3GHz quad core with 8Gb RAM and it's too fast to beat. 

That being said, I recall that it was not more than some weeks ago when I managed to trigger it once. Is there any condition that would cause the scroll-list to enter this state if it was scrolled before it had been completed I wonder? I do know it's some sort of race condition because I was able to close the list this last time and open it again waiting some time before I scrolled it. I used to get this a lot when I had a much lighter workstation with limited RAM and a 32bit version of the OS but still running a ton of active apps (I like to get my monies worth :)

I think that Kevin was triggering it with his scroll-wheel as it's very quick to scroll the list after you have opened it as you do not have to move the mouse all the way to the bottom of the list to activate the arrow. BTW, I an using a Logitech G9 mouse with the scroll-wheel in free-running mode for very fast scrolling and that is a great way to stress anything.

Comment 6

[Tyler Downer [He/Him]]

No reply, INCOMPLETE. Please retest with Firefox 3.6.8 or later and a new profile (http://support.mozilla.com/kb/Managing+profiles). If you continue to see this issue with the newest firefox and a new profile, then please comment on this bug.