1203466 - Developer tools theme causes scrollbutton "<" in TabsToolbar to have very small width

Status: NEW

(Firefox :: Theme, defect)

Description

[arni2033]

Attachment: screenshot - Developer tools theme causes scrollbutton in TabsToolbar to have very small width.png

STR:   (Win7_64, Nightly 43, 32bit, ID 20150909030223, new profile, safe mode)
0. Set Developer Tools theme for the browser
1. Open new window in maximized mode
2. Open enough tabs to cause overflow, open 5 more tabs.
3. Switch window to normal (not maximized) mode
4. Press Ctrl+9 to switch to the last tab, right-click it and click "Pin tab"
5. Switch window to mazimized mode
6. Press Ctrl+9 to switch to the last tab
7. Press Ctrl+1 to switch to the pinned tab

Result:       Scrollbutton in TabsToolbar is very narrow (looks like it was moved under pinned tab)
Expectations: Scrollbutton should have normal width

Possible solution:
I tested in extension "Stylish" the following CSS and it was OK:
>   .arrowscrollbox-scrollbox
>   {
>     padding-left:0px!important;
>     padding-right:0px!important;
>   }