Firefox: focus issues?

I am not sure if it occurs under window managers with different focus
methods, though I was not able to reproduce it under xfce4.

When I try to enter text in e.g the urlbar in firefox, focus is
sometimes seeming a bit weird, as if the urlbar is flashing trying to
open suggested matches (based on search history), but then loses focus
and closes again. Right-clicking inside the browser-window and then
left-clicking outside the context menu to close it, before trying the
urlbar again, tends to temporarily make the searchbar act as expected.

I also sometimes seem to have issues getting relevant url-suggestions
when the urlbar does open its dropdown of browsing history, usually
when I started typing to append characters to an already typed-out url.
Rather than suggest previous searches that resulted from appending to
the url (usually subpages on the same domain), firefox tends to suggest
wildly different urls now and then -- only sometimes suggesting urls on
the same domain.

Now either or both of these two issues this could just be firefox (or 
gtk) doing just gtk-things, but I have not heard much talk about such
issues  (savefor maybe an earlier thread on focus issues from a while
back on this list?).

Has anyone else had similar experiences with (I suppose) gtk-applications?

Is this something some of the slightly esoteric application-specific 
ctwm-options might help solve (IgnoreTransient, DontSetInactive) ?