357931 - about:config dragging scrollbar locks with Ctrl-A is pressed

Status: NEW

(Firefox :: Settings UI, defect)

Description

[drummer12]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20061010 Firefox/2.0
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20061010 Firefox/2.0

If you go into about about:config, hit Ctrl-A, then try to scroll with the mouse (drag the scrollbar), it goes a few pixels, and stop with a error icon.

Reproducible: Always

Steps to Reproduce:
1. about:config
2. Ctrl-A
3. drag scrollbar w/mouse

Actual Results:  
Scrollbars lock

Expected Results:  
Page should scroll

Comment 1

[Ria Klaassen (not reading all bugmail)]

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20061024 BonEcho/2.0

Works for me. It just scrolls down.
Please retry with disabled extensions (Firefox's safe-mode), with a new profile or with a re-installation in a new empty directory.

Comment 2

[Ria Klaassen (not reading all bugmail)]

OK, I see what you mean. When I first select a line, then press ctrl + A, I can't scroll with the scrollbar indeed.

Comment 3

[l_v_brienen]

I have seen this behavior myself, but the icon mentioned also appeared while trying to drag one of the lines in about:config. 

If this is related then this is a case of the scrollbar clashing with drag-and-drop.
This would require that part of the selection lays under the scrollbar, presumably not part of the selected line since it also happens outside of the selected line's vertical area.
If this is the cause then it could be partially solved by including a deselect option.

Comment 4

[l_v_brienen]

One more thing, this bug also exist on Linux, but since (as I've heard) About:config is implemented in JavaScript, it's not surprising.

Comment 5

[Wayne Mery (:wsmwk)]

not seeing this. wonder why.
ctrl+A+scroll == ctrl+scroll == scrolls one line at a time
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.2) Gecko/2008091620 Firefox/3.0.2

Comment 6

[Wayne Mery (:wsmwk)]

(In reply to Ria Klaassen (not reading all bugmail) from comment #2)
> OK, I see what you mean. When I first select a line, then press ctrl + A, I
> can't scroll with the scrollbar indeed.

I still cant produce this with vista