WebKit GTK (headful) requires libffi.so.6 which is not available on Ubuntu 20.04 (list of available packages).

The closest match is libffi7, and my workaround is to symlink it as libffi.so.6:
$ find /usr/lib -name "libffi.so*"
/usr/lib/x86_64-linux-gnu/libffi.so.7
$ sudo ln -s /usr/lib/x86_64-linux-gnu/libffi.so.7 /usr/lib/x86_64-linux-gnu/libffi.so.6
Filing this for others that might run into it, and to verify if this is the best way.
WebKit GTK (headful) requires libffi.so.6 which is not available on Ubuntu 20.04 (list of available packages).
The closest match is libffi7, and my workaround is to symlink it as libffi.so.6:
Filing this for others that might run into it, and to verify if this is the best way.