Re:There have been plugins for this for a long tim (Score 2, Informative)

You can disable the "disable cookies" option in the settings, leaving all other option available then Stealther is active. I also tried adding the functionality of having a "temporary cookie store" but things got messy, so I kept the current functionality, upgrading the add-on mostly only to keep up with the Firefox releases. Looks like it will soon be obsolete anyway, so thanks to everyone for using it ;) /author