I too

Clear the cache and the cookies from sites that cause problems.

• "Clear the Cache": Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
• "Remove the Cookies" from sites causing problems: Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Appearance/Themes).

• Don't make any changes on the Safe mode start window.

• https://support.mozilla.com/kb/Safe+Mode
• Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

Do you use Panda Cloud AV? If so, try killing the Panda URL Filtering process. If this eliminates the problem, then use Control Panel to remove Panda Security URL Filtering.

problem with Yahoo mail persists in safe mode or whatever else I try this is a serious problem that should be addressed by Mozilla the number of people having this problem are growing by the day

The requested URL /neo/launch was not found on this server. Apache/2.2.9 (Debian) PHP/5.2.6-1+lenny9 with Suhosin-Patch Server at us.mg4.mail.yahoo.com Port 80

@delasset See these posts for some help:

• https://support.mozilla.com/en-US/questions/809277
• https://support.mozilla.com/en-US/questions/805522

Check and tell if its working.

I put the error "Not Found

The requested URL /neo/launch was not found on this server. Apache/2.2.9 (Debian) mod_jk/1.2.26 PHP/5.2.6-1+lenny4 with Suhosin-Patch mod_python/3.3.1 Python/2.5.2 mod_ruby/1.2.6 Ruby/1.8.7(2008-08-11) mod_ssl/2.2.9 OpenSSL/0.9.8g Server at us.mg5.mail.yahoo.com Port 80" in the browser and even though it came up in a yahoo page the place to respond came up here. Anywho... a person replied that they did some exploring and found an anti phising in their add remove program, and that once they removed it yahoo mail worked fine. So I went to my add/remove program and found I had an anti phising. I removed it and wha la... my yahoo mail works just fine now. Hope this helps others.