Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

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

firefox error 500 we're sorry but we weren't able to process this request.

  • 3 ŋuɖoɖowo
  • 1 masɔmasɔ sia le esi
  • 1 view
  • Nuɖoɖo mlɔetɔ cor-el

more options

firefox error 500 we're sorry but we weren't able to process this request. tried everything like reset firefox,disable all plug in add on extension,re install firefox,delete cookies but getting the same error

firefox error 500 we're sorry but we weren't able to process this request. tried everything like reset firefox,disable all plug in add on extension,re install firefox,delete cookies but getting the same error

All Replies (3)

more options

Please help also tried the malware cleaner

more options

This is an error on the website's end. What site is it happening on?

more options

This issue can be caused by corrupted cookies or cookies that are blocked (check the permissions on the about:permissions page).

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 > "Use custom settings for history" > Cookies: "Show Cookies"

If clearing cookies didn't help then it is possible that the cookies.sqlite file that stores the cookies got corrupted.