With Firefox 14.0.1 in Hotmail when I press "reply" on a message then Firefox locks up for about 30s. This happens after the reply message appears but before it fills in the "to" box.
Clear the cache and the cookies from sites that cause problems.
"Clear the Cache":
"Remove Cookies" from sites causing problems:
Start Firefox in Safe Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).
OK, thanks. I tried all of that. It still does it.
It looks like it's related to a script that fills in the "to" address box.
It seems to be related to the Add On "Microsoft silverlight plugin 4.1.10329.0". I thought that safe mode disabled add ons.
Safe Mode might not disable Plugins, but it definitely disables Extensions.
I just updated Silverlight and that solved the problem for me!