627191 - "Show all tabs" buttons flickers when clicked

Status: UNCONFIRMED

(Firefox :: Tabbed Browser, defect)

Description

[gadjo]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b10pre) Gecko/20110119 Firefox/4.0b10pre
Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b10pre) Gecko/20110119 Firefox/4.0b10pre

There are 4 "show all tabs" button (let's call it SAT) states, as in the first attachment. When clicking SAT it makes some unnecessary switches between the states, as described below

Reproducible: Always

Steps to Reproduce:
0. When in maximized mode in with tabs in title enabled - by default SAT is in the state 1 (see the first attachment)
1. Move mouse over SAT - state 2
2. Press mouse button (don't release it) - state 3
3. Release it - state 2 for a short while, then state 5
4. Press mouse button again (don't release it) - state 4, then state 3
5. Release mouse button - again state 2, then state 5

Actual Results:  
In steps 3 & 5 SAT is for a while in state 2
In step 4 SAT is for a while in state 4

Expected Results:  
In steps 3 & 5 SAT shouldn't be in state 2
In step 4 SAT shouldn't be in state 4

Same thing happens also with tabs in title disabled (or not in maximized mode), but SAT looks different than in the first attachment

Comment 1

[gadjo]

Attachment: "Show all tabs" button states

Comment 2

[gadjo]

Attachment: Flickering button (video)

Comment 3

[Srinivas]

Mozilla/5.0 (Windows NT 6.1; rv:2.0b10pre) Gecko/20110119 Firefox/4.0b10pre

Able to reproduce

Comment 4

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Does it work when you disable hardware acceleration in the advanced pane of the preferences?

Comment 5

[gadjo]

Yes, after turning off acceleration and restarting firefox it still behaves as described