I have been using Portable Firefox (and now Firefox Portable) as my main browser for several months, as I prefer to have everything saved in one folder.
The improvements in Firefox Portable 2.0 are terrific, however I often notice a considerable delay when closing tabs (with the middle mouse button) - occasionally as much as five seconds or so between clicking the mouse button and the tab closing.
Is this a known issue with Firefox Portable? I read one or two posts complaining about slow start-up times caused by Session Saving/Undo functionality. Yet the suggestions to change the Browser.sessionstore.enabled option appear to pre-date v2.0RC2. Furthermore, I am running the application locally, from harddisk so there should not be any slow-downs, surely?
For your information, this is a 'clean' Firefox Portable 2.0RC2 'installation', with the DOM Extension removed and just the RikaiChan extension added.
Well, keep up the great work, take care,