Firefox 5.0

[Solus Corvus]

Thanks Solus, but I don't think it'll do what I need it to. But I'll check it out anyhow

I just tested it and it works, though not exactly as you describe. I don't know how to get it to open a specific set of tabs from scratch on startup. But with tab mix it will remember all of the tabs you have open and all the windows you have open. If you open a different set of tabs in two separate windows then using file->exit (instead of closing each window with the X) tab mix can open both windows in their exact position with all of their tabs when you start firefox again.

Edit: It has occurred to me that you can in fact start firefox only with a specific set of tabs each time you start (instead of all the ones you had open last time you closed the browser). In tab mix options there is a session tab. On that tab if you disable firefox's built-in session management it makes a significant number of options for session management available. You could probably set it to save the session on close once (with all of your default tabs open) and exit via file->exit, then next time set it to not save the session at startup. Then when you use file->exit and then open it back up it would restore the last saved session (the one with your tabs and windows the way you like).