I have sent Invision this message -
the forum at
http://w3schools.invisionzone.com/index.php
does not allow me to sign in using Firefox on Mac. Safari, OK.
ALSO, see in the forum ---
W3Schools Forum → W3Schools → Critiques
"This forum is broken with iexplorer
Started by Greg Boyles, Mar 16 2014 12:22 PM"