Tap here to go to the mobile version of the site.
Your Firefox is out of date and may contain a security risk! Upgrade Firefox

Support Forum

When I try to go to certain pages on PayPal, I get an error message which says 400 Bad Request: Size of request exceeds server limit. Didn't do it before the lasted Foxfire update. Can I revert to an older version?


1. Using Windows XP home

2.PayPal is the only website I have problems with Foxfire; works fine on IE8

3. I can get to some of the desired pages through other links on PayPal so it's not the pages themselves

4. The error message contains this: Cookie: KHcl0EuY7AKSMgfvHl7J5E7hPtK=STMZXVPEjOuzek-HGHcBJRjmRXIQgXpML8uy9fV13oPeEYcAUnBOhKFzvNJqcb-rsc2S6nlYOklSdX6P; cookie_check=yes; LANG=en_US%3bUS; INSIDE

When I saw Cookie, I did a disk clean including temp files and cookies. No difference. I also did a System Restore, to no avail.

5. The 400 message actually reads: Size of a request header field exceeds server limit.

6. Talk to PayPal customer service and they have not heard about any Foxfire conflicts.

7. Windows Firewall and Kaspersky Firewall turned ON but this is the same configuration before the Foxfire software update. PS. I'll give up Foxfire before I give up Kaspersky

Modified by mrs.germany

Additional System Details

Sites Affected


Installed Plug-ins

  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Shockwave Flash 10.2 r153
  • iTunes Detector Plug-in
  • Next Generation Java Plug-in 1.6.0_24 for Mozilla browsers
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • Adobe Acrobat Plug-In Version 5.00 for Netscape
  • Npdsplay dll
  • DRM Store Netscape Plugin
  • DRM Netscape Network Object


  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1

More Information

  • Top 10 Contributor
  • Moderator
10737 solutions 96600 answers

Helpful Reply

This issue can be caused by corrupted cookies.

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"

Question owner

It worked! Thank you SO much!

sheilabb 0 solutions 1 answers

Helpful Reply

Thank you, your suggestion worked, but why do I get this message over and over and over after each transaction? Having to clear my cache after every transaction to do the next one is tedious!

  • Top 10 Contributor
  • Moderator
10737 solutions 96600 answers

It is more likely a cookie problem.

Did you clear the (PayPal) cookies as well?

KarenChun 0 solutions 9 answers

Clearing cache makes it work again until it stops working. I can't keep clearing my cache. I'm developing. THIS IS A FIREFOX BUG and it may be related to paypal sandbox. Does not occur in Chrome.