This problem still exists in latest Firefox (25.0), but I got a workaround (NOT by disabling global-menu):
I invoked the Unity's HUD menu shortcut (by pressing the Alt key) at the first time I opened Firefox, then typed something on it just so that the HUD loads all Firefox menu. Then closed the HUD and back to Firefox window then I got all menus (including my huge bookmarks, history, etc) can be opened normally (quickly). So I suggest to the firefox-global-menu-addon developer/team to implement some kind of PRELOADING for Firefox menus whenever it is started. PS: Sorry for my Engrish :))) . -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1097659 Title: Firefox slow to display contents of bookmarks folder Status in “firefox” package in Ubuntu: Confirmed Bug description: My 5 year old 2MB Dell Dimension E520 desktop used to be quick for Lucid's Firefox to display contents of a bookmarks folder when that folder's name was clicked on (under the Bookmarks menu entry). Since doing a clean install (with all packages updated) of Precise last week, it's slow (can take 10+ seconds perhaps depending on number of entries in a folder) to display contents of bookmarks folder. When I disable the Unity Global Menu Bar for Firefox & Thunderbird, behaviour is back to normal. This applies to latest version of Menubar (3.6.4 installed just now) as well as previous version. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: firefox-globalmenu 18.0+build1-0ubuntu0.12.04.3 ProcVersionSignature: Ubuntu 3.2.0-35.55-generic-pae 3.2.34 Uname: Linux 3.2.0-35-generic-pae i686 AddonCompatCheckDisabled: False AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 ApportVersion: 2.0.1-0ubuntu15.1 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: john 1836 F.... pulseaudio BuildID: 20130107224926 CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xdffdc000 irq 44' Mixer name : 'SigmaTel STAC9227' Components : 'HDA:83847618,102801dd,00100201' Controls : 38 Simple ctrls : 21 Channel: Unavailable Date: Wed Jan 9 10:03:40 2013 ForcedLayersAccel: False IfupdownConfig: auto lo iface lo inet loopback InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3) IpRoute: default via 192.168.1.1 dev eth0 proto static 169.254.0.0/16 dev eth0 scope link metric 1000 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.2 metric 1 IwConfig: lo no wireless extensions. eth0 no wireless extensions. MarkForUpload: True PrefSources: prefs.js [Profile]/extensions/{b9db16a4-6edc-47ec-a1f4-b86292ed211d}/defaults/preferences/prefs-dwhelper.js ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash Profiles: Profile0 (Default) - LastVersion=18.0/20130107224926 (In use) RelatedPackageVersions: rhythmbox-mozilla 2.96-0ubuntu4.2 totem-mozilla 3.0.1-0ubuntu21.1 RfKill: RunningIncompatibleAddons: False SourcePackage: firefox UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/30/2007 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.3.2 dmi.board.name: 0WG864 dmi.board.vendor: Dell Inc. dmi.chassis.type: 6 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.3.2:bd03/30/2007:svnDellInc.:pnDellDM061:pvr:rvnDellInc.:rn0WG864:rvr:cvnDellInc.:ct6:cvr: dmi.product.name: Dell DM061 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1097659/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp