So, going to Tools -> Settings -> Home section, is it set to Custom URLs.. with the field below set to https://www.yahoo.com/  ?

If you just go to yahoo.com via the address bar does it do same thing where it displays for a moment then goes blank?

I just tried make yahoo.com my home page and it seemed to work. I am also using Firefox 149.0.2 in Windows 10.

My original entry was https://my.yahoo.com. That momentarily displays and then goes blank. I then tried your yahoo.com. Same result.

I've tried www.yahoo.com. Same result.

Only yahoo is the problem.

This sounds like another user sees the same: https://support.mozilla.org/questions/1581882

(I don't see any elevated webcompat reports for yahoo in general, so this doesn't seem widespread?)

I have Firefox 151.0 and I still can not display yahoo.com, my.yahoo.com or www.yahoo.com. It displays for a split second then the screen goes blank. And like everyone else, I can use any website other than yahoo.com. Also, any other browser I use does display YAHOO.

I have customized in settings to allow yahoo.com. That does not work.

After a month or so...... I'm still waiting.

Hi, as a test, can you go to about:config and switch security.ssl3.ecdhe_ecdsa_aes_128_sha to false?