You're switching between 3.6 and 38 and the bookmark file format
is too different between those versions. We don't support running
both on the same computer and we never have, even though it would
at least seem to work before. This isn't going to change. If you
absolutely have to do this, you'll need to backup your bookmarks.
Please see this thread:
As far as the second issue, your bank probably uses a
third-party tool or plugin to authenticate your e-card. TenFourFox
doesn't support this and hasn't since at least version 6.0; most of
the current technology requires an Intel Mac in any case, and none
of our developers have any banking systems that use this sort of
technology, so this isn't going to change either. If you absolutely
require this functionality, you'll have to remain with 3.6.