Hello listmates, I'm hoping someone can shed some light on what's going on with Firefox. While running arch (not ubuntu 9.04/fedora 11 which I also have installed on the same laptop), I run into the following scenario nearly every time I attempt to launch Firefox. "Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system." Sure enough, I'm not being lied to: $ ps -ef | grep firefox tgelter 10871 4318 2 22:30 ? 00:00:02 /usr/bin/firefox $ killall firefox && firefox and I'm in business. The thing is, it doesn't matter how I shut down Firefox (click the X, file->quit, ctrl+w closing each tab until the last takes down Firefox), I always end up in the same situation. I went to #archlinux on freenode to talk about the issue a while back (this issue has been plaguing me for weeks) and was told to try disabling extensions/themes, creating a new profile and using that, "pacman -Rsn firefox && pacman -Sy firefox"ing, I even got so fed up that I did a fresh install on a new partition and tried again. Nothing has worked, at all. Following is my info, I really doubt I'm the first person to run into this so please, can anyone help? arch x86_64 on a Lenovo T61 laptop (nvidia video card w/ proprietary driver) x86_64 version of Firefox, x86_64 versions of jre/flash installed (this is a must) I run a kde 4.2.4 desktop installed from kdemod. $ pacman -Sl | awk '{print $1}' | sort | uniq -c 1900 community 175 core 1983 extra 390 kdemod-core 82 kdemod-extragear 62 kdemod-playground As you can see above, I don't have any testing/unstable packages installed though there are some from extra & kdemod-playground. If you need any other info, let me know. Remember this problem only happens under arch, I have the same usage patterns and package selections under Fedora/Ubuntu as far as I know.