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I'm running Ubuntu 12.10 with XFCE 4.10. Firefox version 20.0.

Whenever I try to download any files (eg, right-click and download, anything like that), there's a significant delay (~15 seconds). It doesn't matter how large the file is -- a 20kB file has a delay, and so does a 10MB file. I've tried clearing out the list of previously-downloaded files, but that didn't help.

I also have Chromium installed, but it doesn't have the same delay problem.

Any suggestions?

Currently mounted drives/devices

/dev/sda7 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)
/dev/sda5 on /boot type ext4 (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
/home/xxxxxx/.Private on /home/xxxxxx type ecryptfs
gvfsd-fuse on /run/user/xxxxxx/gvfs type fuse.gvfsd-fuse 
/dev/sda3 on /media/xxxxxx/8C4896FB4896E36E type fuseblk 
/dev/sdb1 on /media/xxxxxx/DATAPART1 type fuseblk 

This is a dual-boot Windows 7/Ubuntu 12.10 machine, and /dev/sda3 and /dev/sdb1 are the Windows volumes C: and D: respectively.

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Do you see the delay when you run Firefox in safe mode? Press Alt+H+R to restart Firefox with add-ons disabled. – user25656 Jul 29 '13 at 15:19
Do you happen to have any remote filesystems mounted? I noticed a similar delay elsewhere, that turned out to be caused by my NAS waking up. – Jos Jul 29 '13 at 15:21
The same delay happens in safe mode. I sometimes have some Novell drives mounted, but they're not mounted now, and I'm still seeing the delay. I'll add the results of mount to my question, in case they're salient. – Pat J Jul 29 '13 at 15:56
You may be better off asking this question here as it appears to be a Firefox issue. However, I would be curious to see what happens if you start Firefox with a blank profile: firefox -ProfileManager – Jos Jul 29 '13 at 16:45
@Jos -- It's a Firefox issue, yes, but it's only happening for me on Ubuntu 12.10/XFCE. My Windows machine at home works fine, but both my work machine and my laptop (both Ubuntu 12.10 with XFCE) exhibit the delay. Also, Firefox with a brand-new blank profile still exhibits the delay. I'll contact Mozilla, too, thanks. – Pat J Jul 29 '13 at 18:23
up vote 0 down vote accepted

Apparently it was not necessarily a Firefox issue. I updated some other packages and the problem went away after the reboot. I can't say for sure what the issue was, but it's solved now.

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