Firefox 3.0 will not be officially supported by Mozilla for much longer and some planned KeeFox features will be easier to implement if I concentrate on version 3.5+ only. For these reasons, KeeFox version 0.8 will require Firefox 3.5+.
I don’t plan to drop support for 3.5 until after the release of KeeFox version 1.0 unless Mozilla officially withdraws support in the mean-time. However, to ensure you’re getting the fastest and most secure browsing experience, it is always advisable to upgrade to the latest Firefox version as soon as possible.