1246556 - Arrow .tab-drop-indicator between tabs is invisible under dragging dark images/content when dark lightweight lwtheme is in use

Status: NEW

(Firefox :: General, defect)

Description

[arni2033]

Attachment: testcase 1 - Arrow .tab-drop-indicator between tabs is invisible under dark content.html

>>>   My Info:   Win7_64, Nightly 46, 32bit, ID 20160207030402
STR:
1. Enable any dark lwtheme, e.g. https://addons.mozilla.org/ru/firefox/addon/just-black/
2. Open new tab
3. Open "testcase 1"
4. Drag any black rectangle between any 2 tabs

AR: "drop" indicator (arrow between tabs) isn't visible under image/link.
ER: "drop" indicator should be visible

Note:
 bug 1209158 could make it better, but still, the drop indicator is drawn _under_ the thumbnail
 of dragging content, which makes it less visible. GoogleChrome draws that arrow _above_
 the dragging content, so it (the arrow) is visible when I drag any kind of content.

Comment 1

[arni2033]

Attachment: screenshot 1 - Arrow .tab-drop-indicator between tabs is invisible under dark content.png