1340812 - Cannot use the scroll bar in the "List all tabs" list (scrolling with mouse wheel works though)

Status: RESOLVED INVALID

(Firefox :: Untriaged, defect)

Description

[Guilherme Lima]

Open enough tabs that the arrow pointing down appears. Click on it. The list shows up but I can't scroll it nor click/drag the "mini bar" that appears in it.

Comment 1

[Andre Klapper]

Hi reporter, 
unfortunately this report is not very useful because it does not describe the problem well. If you have time and can still reproduce the problem, please read https://developer.mozilla.org/en-US/docs/Mozilla/QA/Bug_writing_guidelines and add a more useful description to this report.
We are missing OS information and Firefox version information.

Comment 2

[Guilherme Lima]

There's nothing much to say, it's not hard to follow the steps I gave.

Open 20 tabs.
Close to the minimize buttons now there's an arrow pointing down.
Click on it.
All the tabs are listed there, but you can't scroll the list.

Reproduced on Firefox 51.0.1 (Release) and Nightly 2017-02-18 (latest).

Comment 3

[Andre Klapper]

No such problems here.
Does the problem still happen if you start Firefox in Safe Mode? (Safe Mode disables extensions and themes, hardware acceleration and some JavaScript stuff in order to exclude some possible reasons for problems. It does not disable plugins which are add-ons.) See http://support.mozilla.com/en-US/kb/Safe+Mode 

And does this also happen with a new and empty profile? See http://support.mozilla.com/en-US/kb/Basic%20Troubleshooting#w_8-make-a-new-profile and http://support.mozilla.org/kb/Managing%20profiles

Which operating system and version is this about?

Comment 4

[Ivan]

Versions and Environment:

Windows 7 Home premium SP1 64-bit
Firefox 51.0.1 (32-bit)
Safe mode and new blank user of Firefox
Installed Java version 8
No silly toolbars or add-ons installed
No Adobe Flash and Silverlight installed

Bug reproduced also on Win 7 Professional SP1 64-bit with Firefox 50.0



Steps to reproduce:

1. Start Firefox in safe mode and with new user profile
2. Open about 20+ tabs in the same browser window (tabs may be blank, no website needed to be loaded)
3. Click on the downward-facing arrow at the top right corner of the browser window - "List all tabs"
4. A drop-down list with all tabs appears
5. I try to scroll up and down the list both with the mouse wheel and with the scroll that appears on the right-hand-side of the tabs list



Expected result:

I am able to scroll up and down the tabs list either with the mouse wheel or with the scroll that appears on the right-hand-side of the tabs list



Actual result:

I am UNABLE to scroll up and down the tabs list neither with the mouse wheel nor with the scroll that appears on the right-hand-side of the tabs list



Video and Images:

See screenshot at: https://github.com/vankatabe/SoftUni-QA_Course-Playground/blob/master/Cant_Scroll_Firefox.png

Comment 5

[Ivan]

(In reply to Ivan from comment #4)

I am sorry but I made a mistake in:

1) Steps to reproduce - step 2: The correct text is: Open 40+ tabs in the same browser window


2) In:
- Steps to reproduce - step 5
- Expected result
- Actual result
The correct text is: I *am* able to scroll with mouse wheel but unable to scroll with the scroll that appears on the right-hand-side of the tabs list

Thanks and apologies again.

Comment 6

[Guilherme Lima]

I can't scroll it using the mousepad - I have a Samsung notebook with Windows 7

Comment 7

[Vlad Bacia-Mociran [:VladB]]

Hi Guilherme. The "mini bar" is not scrollable nor clickable. 

It's an indicator to show which of the tabs are currently visible in the browser tab bar. The ones in the list outside the grey indicator are also hidden from the tab bar. If you resize the browser window you will observe that the bar will shrink or enlarge depending on the number of tabs displayed. This is a feature.