Re:CPU and memory hogging bug in Firefox 1.5? (Score 1)

I had that problem too. It occured after I tried to set and then un-setup a custom config, making the tabs appear on the left side. I tried and tried to install - uninstall , but finally I wiped out the old files completely (i.e. put them in a "old files" location) and reinstalled clean (while later pilfering the old plugins, bookmarks and search plugins).