But, it's still not normal and I wonder if anyone from FF monitors this site and reports issues to be fixed ??  I've had the ebay account for a lot of years and I've not changed "anything", so this should not be happening.  It just makes me feel that something else like this is just down the line a bit.  And, when it first started happening I tried MS Edge and it opened up the site, but wanted me to change my computer over to them for using Ebay and I didn't want too.  Other people might say OK, and leave FF which would not be a good thing.
 Thanks to all that tried to help me with this issue.

Well, I tried starting FF in "safe mode" and then typing in the URL bar "ebay.com" and things went like they are supposed to. Ebay came up everything seemed to be "normal". I didn't want to try a FF "refresh" and start all over after that. So, I started FF in "regular mode" and the next thing I tried was typing into the URL bar "https://www.ebay.com/myb/Summary" and things went fine by bringing up Ebay with me signed in and the site "seeming" to work as normal. I've not tried to order anything yet, but I feel like it's working OK now. So, I changed my bookmark to the above at least for now. But, it's still not normal and I wonder if anyone from FF monitors this site and reports issues to be fixed ?? I've had the ebay account for a lot of years and I've not changed "anything", so this should not be happening. It just makes me feel that something else like this is just down the line a bit. And, when it first started happening I tried MS Edge and it opened up the site, but wanted me to change my computer over to them for using Ebay and I didn't want too. Other people might say OK, and leave FF which would not be a good thing. Thanks to all that tried to help me with this issue.