[Bug 1718008] [NEW] Dragging Tab to Toolbar Bookmark Folder doesn't work when most right tab

[Dirk Detering]

Public bug reported:

State:

 * Some tabs open, one of them babeljs.io
 * Bookmark toolbar is visible.
 * Created a new bookmark folder, which is now the top right.

Problem:
Trying to drag open tabs onto the new folder to bookmark the links.

Some tabs, when dragged over the folder, activate it and the folder
opens to make drop possible (expected behaviour).

Dragging the babeljs.io tab over the bookmark toolbar opens each
bookmark folder but not the new one at most right position.

Trying to reposition the most right bookmark folder by dragging to
another position doesn't work either, the folder can't be grabbed.

Grabbing any other bookmark folder and moving that to the most right
position repeats this effect for that folder now.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: firefox 55.0.2+build1-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.4.0-91.114-generic 4.4.76
Uname: Linux 4.4.0-91-generic x86_64
NonfreeKernelModules: wl
AddonCompatCheckDisabled: False
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/pcmC1D0p:   det        1804 F...m pulseaudio
 /dev/snd/controlC1:  det        1804 F.... pulseaudio
 /dev/snd/controlC0:  det        1804 F.... pulseaudio
BuildID: 20170816210634
Channel: Unavailable
CurrentDesktop: Unity
Date: Mon Sep 18 20:50:34 2017
ForcedLayersAccel: False
IfupdownConfig:
 auto lo
 iface lo inet loopback
IncompatibleExtensions:
 English (South Africa) Language Pack - langpack-en-ZA at firefox.mozilla.org
 English (GB) Language Pack - langpack-en-GB at firefox.mozilla.org
 Deutsch (DE) Language Pack - langpack-de at firefox.mozilla.org
 Default - {972ce4c6-7e08-4474-a285-3208198ce6fd}
InstallationDate: Installed on 2012-10-07 (1806 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
IpRoute:
 default via 192.168.1.254 dev wlan0  proto static  metric 600 
 169.254.0.0/16 dev wlan0  scope link  metric 1000 
 192.168.1.0/24 dev wlan0  proto kernel  scope link  src 192.168.1.104  metric 600
Plugins: Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
PrefSources: prefs.js
ProcEnviron:
 LANGUAGE=de_DE
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=55.0.2/20170816210634 (In use)
RunningIncompatibleAddons: True
SourcePackage: firefox
UpgradeStatus: Upgraded to xenial on 2016-08-16 (397 days ago)
dmi.bios.date: 12/14/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 204
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: 1225B
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 204
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr204:bd12/14/2011:svnASUSTeKComputerInc.:pnR252B:pvr1.0:rvnASUSTeKComputerInc.:rn1225B:rvr204:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: R252B
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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Title:
  Dragging Tab to Toolbar Bookmark Folder doesn't work when most right
  tab

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