This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

I am getting an error Bad Request Request too long HTTP Error 400. The size of the request headers is too long.

  • 1 reply
  • 64 have this problem
  • 1 view
  • Last reply by cor-el

BoydH
BoydH
more options

When I sign into Methodintegration.com my data base I can get in ok. When I sign out I get the following error: I am getting an error Bad Request Request too long HTTP Error 400. The size of the request headers is too long. If I close Fire Fox and go back in it will work one time and then I get the same error message.

When I sign into Methodintegration.com my data base I can get in ok. When I sign out I get the following error: I am getting an error Bad Request Request too long HTTP Error 400. The size of the request headers is too long. If I close Fire Fox and go back in it will work one time and then I get the same error message.

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

That is usually a problem with 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"