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

"Clear the Cache":

• Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

• Firefox/Tools > Options > Privacy > Cookies: "Show Cookies"

Also make sure that you aren't blocking the referrer.

• http://kb.mozillazine.org/network.http.sendRefererHeader

See also:

• http://kb.mozillazine.org/The_page_is_not_redirecting_properly
• http://kb.mozillazine.org/Websites_report_cookies_are_disabled

Thanks for your reply. I've tried what you suggested and nothing helped! I'm still getting the errors etc :(

Anything else?

Does it work in a Private Browsing mode window (tab)?

Just tried it. The web page still gives me that error

You can remove all data stored in Firefox from a specific domain via "Forget About This Site" in the right-click context menu of an history entry ("History > Show All History" or "View > Sidebar > History") or via the about:permissions page.

Using "Forget About This Site" will remove all data stored in Firefox from that domain like bookmarks, cookies, passwords, cache, history, and exceptions, so be cautious and if you have a password or other data from that domain that you do not want to lose then make sure to backup this data or make a note.

You can't recover from this 'forget' unless you have a backup of the involved files.

It doesn't have any lasting effect, so if you revisit such a 'forgotten' website then data from that website will be saved once again.

You can also check the Net log and the Network log in the Web Console (Firefox/Tools > Web Developer) to see if you can figure out why you get redirected.

• https://developer.mozilla.org/Tools/Web_Console

Thank you so much! You're a life saver.