Puntuado con 1 de 5 estrellas  Neither SafeHistory 0.8 nor 0.9
(http://crypto.stanford.edu/SafeHistory/stanford-
safehistory-0.9.xpi) are working for me with FF 3.6.13 after
making the maxversion trick in install.rdf to allow install.
Both are making the browser to cease adding items to history
list, or at least not showing. Update is needed for FF3.6.x and
upper 3.x versions! (4.x and upper versions doesn't need
SafeHistory feature).  Also it has the same flaw in
Options->Privacy for FF versions >2.X. It's the same problem I
found for SafeCache, and you can find the fix here:
https://addons.mozilla.org/en-
us/firefox/addon/safecache/reviews/user:5280876 in case you
still want to try.