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

[Dirk Detering]

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 - <email address hidden>
 English (GB) Language Pack - <email address hidden>
 Deutsch (DE) Language Pack - <email address hidden>
 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.

[Paul White (paulw2u)]

We are sorry that we do not always have the capacity to review all reported bugs in a timely manner. You reported this bug some time ago and there have been many changes in Ubuntu and Firefox since that time.

Do you still see a problem related to the one that you reported using currently supported versions of Firefox and Ubuntu? Please let us know if you do otherwise this report can be left to expire in approximately 60 days time.

Thank you for helping make Ubuntu better.

Paul White
[Ubuntu Bug Squad]

[Launchpad Janitor (janitor)]

[Expired for firefox (Ubuntu) because there has been no activity for 60 days.]