Facebook not visible in Firefox

view story

http://askubuntu.com – Does anyone know why Firefox cannot display Facebook pages, even the main front page on www.facebook.com. Works sort of okay in Chrome except for the error 500 pages that I get a lot of but I eventually, after many minutes can get a log-on. Opera cannot find facebook at all unless using a proxy. Oh!Firefox will allow viewing of Facebook when using certain proxies but no way on direct connection via my Dutch ISP - Ziggo. (HowTos)