1399405 - Bookmark separator appearing in wrong position on screen

Status: RESOLVED DUPLICATE of bug 1398252

(Firefox :: Toolbars and Customization, defect)

Description

[David F]

Attachment: Incorrect position of bookmark separator in FF 57 nightly

The separator between bookmarks in the toolbar is displaying in an incorrect position in the Firefox 57 Nightly (2017/09/13 build).

Steps to reproduce:
- Open bookmarks toolbar
- Attempt to drag a new bookmark from an open tab into the toolbar
- Observe the position of the separator between the bookmarks. 
- In the nightly it will be next to the tab whilst in the current stable (56) it works as expected.

Attached is a screenshot which shows the correct behaviour in Firefox 56 (top) and the incorrect in the nightly build (bottom).

System:
Windows 10 x64 Build 15063.

Unable to test if this also affect other operating systems such as Linux.

Comment 1

[David F]

[Tracking Requested - why for this release]: Mark as regression in FF 57

Comment 2

[Julien Cristau [:jcristau]]

Is this the same as bug 1389162 or something else?