You can try these steps in case of issues with web pages:

You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.

• Hold down the Shift key and left-click the Reload button
• Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• Press "Command + Shift + R" (Mac)

Clear the cache and cookies only from websites that cause problems.

"Clear the Cache":

• The image "new fx menu" does not exist. > Options/Preferences> Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

• The image "new fx menu" does not exist. > Options/Preferences > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"

I'm sorry your suggestions made no difference. I cannot load and access my email in Comcast with Firefox 29 no matter what I try. As mentioned, I did install Service Pack 3 for Windows XP so it should be compatible with Firefox 29. I have no problems going to any website. My email account will just not load unless I go back to Firefox 28. Should I do this or use an alternate browser like Google Chrome? Thank you.

Moses: a tech rep at Comcast finally told me they needed to do some upgrades to make the full version of their email program compatible with Firefox 29. He set the email on 'Lite' which seems to work. This was the 4th call to Comcast! Now email seems to be working due to this change. Thanks for the suggestions.

Moses: a tech rep at Comcast finally told me they needed to do some upgrades to make the full version of their email program compatible with Firefox 29. He set the email on 'Lite' which seems to work. This was the 4th call to Comcast! Now email seems to be working due to this change. Thanks for the suggestions.