have you tried different agent (wayfarer, chrome, safari, etc) ?
cache 512 disk
no adblock
audio/video : change option
all in prefs or better prefs:facebook in the menu

make a copy of morphos in another disk
then
hdconfig
change bloc 512 to 2048
format
recopy morphos
(use withcleaner too but it delete your password of facebook etc)
i don t know if that help