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

Error code: SSL_ERROR_NO_CYPHER_OVERLAP

  • 2 replies
  • 0 have this problem
  • 16 views
  • Last reply by cor-el

more options

This error might be the result of the Firefox update on 18 Feb. MS Edge works fine, however.

I have tried linking to other Search Engine home pages and also setting HTTPS-Only Mode to 'ON' for all windows - both without success.

Interestingly, 'thumbnail' links saved on the Firefox homepage work fine too. The problem seems to only occur when I try to input a new web query in the search box.

This error might be the result of the Firefox update on 18 Feb. MS Edge works fine, however. I have tried linking to other Search Engine home pages and also setting HTTPS-Only Mode to 'ON' for all windows - both without success. Interestingly, 'thumbnail' links saved on the Firefox homepage work fine too. The problem seems to only occur when I try to input a new web query in the search box.
Attached screenshots

All Replies (2)

more options

Can anyone help with this error? Simple steps please.

more options

This could be a problem with your Norton security software. Boot the computer in Windows Safe Mode with network support to see if that has effect.


You can check the connection settings.

  • Settings -> General -> Network: Connection -> Settings

If you do not need to use a proxy to connect to internet, select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.

See "Firefox connection settings":