NEED NEWBIE GUIDE!!! Rated 4 out of 5 stars
Apparently most of the "NOT WORKING" complainers are newbies where Stealther ISN'T newbie-proof. Where other addons deal/delete entries "individually", Stealther simply sets common google'able options like; browser.history_expire_days=0, browser.cache.disk.enable=false, network.cookie.cookieBehavior=2, browser.sessionstore.max_tabs_undo=0 etc... As mini guide: a) Stealther relies on default FF mechanisms to work and SHOULD BE DISABLED EVERY TIME NOT NEEDED FOR NOT TO LOOSE DATA!!! especially before exit. b) For a mechanism to become active/deactive, give FF some seconds, e.g. 5sec NO ACTION wait. c) Don't complain Stealther for not to clean entries from other addon histories like TabMixPlus 'tab history'... Stealther may not be bulletproof yet with above steps it worked for me "every time" without loosing data with other 40+ addons...This review is for a previous version of the add-on (1.0.6).