Hi Ari94, Try clearing Cookies & Site Data for Yahoo. There are two methods described here Clear cookies and site data in Firefox. Scroll down to Clear cookies for the current website or Clear cookies for any website.

My_Cheese_Is_Slippin' said

Hi Ari94, Try clearing Cookies & Site Data for Yahoo. There are two methods described here Clear cookies and site data in Firefox. Scroll down to Clear cookies for the current website or Clear cookies for any website.

"I like Cheese"

Hi, thank you very much for the quick and detailed reply. Interestingly I have been following the methods mentioned as per the given URL links.

Thank you Ari

I found this from @FredMcD on a similar thread:

There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites

https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message

https://support.mozilla.org/en-US/kb/connection-untrusted-error-message

https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors?redirectlocale=en-US&redirectslug=Error+loading+web+sites

http://kb.mozillazine.org/Error_loading_websites

https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean

My_Cheese_Is_Slippin' said

I found this from @FredMcD on a similar thread: There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own. https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message https://support.mozilla.org/en-US/kb/connection-untrusted-error-message https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors?redirectlocale=en-US&redirectslug=Error+loading+web+sites http://kb.mozillazine.org/Error_loading_websites https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean

ーーーーーーーーーーーーーー Hi, thank you for the reply. Non of the above apply in my case. Once again thank you.

In regard to having to create a new account, Mozilla is now merging accounts. There will be only one account sign-in.

In regard to TLS handshake: Is Yahoo the only site that you see this problem? Do you have the problem in another browser? Have you tried Firefox's Safe Mode? Do you use a proxy? Have you tried disabling your security software?

My_Cheese_Is_Slippin' said

In regard to having to create a new account, Mozilla is now merging accounts. There will be only one account sign-in. In regard to TLS handshake: Is Yahoo the only site that you see this problem? Do you have the problem in another browser? Have you tried Firefox's Safe Mode? Do you use a proxy? Have you tried disabling your security software?

Hi, thanks once again for reply. I will be answering your questions:

Is Yahoo the only site that you see this problem? No.

Do you have the problem in another browser? Yahoo is set as home page and even other sites takes time.

Have you tried Firefox's Safe Mode? Yes, and it was quick to open website. (may be add-ons creating problem).

Do you use a proxy? No.

Have you tried disabling your security software? No.

May be in the morning I will again test by disabling add-ons one by one.

Thanks. Ari

In the morning, I would suggest: Start Firefox in Safe Mode. Go into your extensions and disable them. Click on the 3-dot button and select Disable. Close Firefox. Start Firefox normally and see if the site loads properly. If it does, you can enable extensions one-by-one to see which one is causing the TLS error.