There is no direct way, but navigation from custom view can be used here like this:
command! fzf :execute '!fzf 2>&0 %%U' | normal! gf
It basically creates a view consisting of a single file and performs navigation to it (gf).
% is doubled because it's inside user-defined command, which also performs macro expansion. stdin -> stderr redirection is needed because
fzf doesn't look for terminal in stdin and vifm redirects stderr to capture errors.
UPD: Some issues with the command above have been reported here. Development version after 0.8.2 (and so the next release) has
%IU macro, which should be used to prevent possible issues with interface after calling fzf:
command! fzf :execute '!fzf 2>&0 %%IU' | normal! gf