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.

ابحث في الدعم

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

I often get this error on Comcast site, Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit.

  • 3 ردود
  • 3 have this problem
  • 7 views
  • آخر ردّ كتبه cor-el

more options

Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit.

Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit.

All Replies (3)

more options

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 Cookies" from sites causing problems:

  • Tools > Options > Privacy > Cookies: "Show Cookies"
more options

This solved the problem!!!! Many thanks. I thought I was going to have to rebuild my profile as a last resort.