My Firefox Has Issue With Youtube..

..and no help so far from Youtube.

I've had Firefox, forever, and never had issues with Youtube as long as I've had it. I have many, fave playlists, and I share a lot of videos with friends & family.

I had to tighten up the purse-strings, so let go of my Premium Acct., and got what they call Premium Lite. I missed saving new videos to my playlists, and also, could no longer "share" a video. Missed my premium, so just got it back a couple of days ago, the 5th. Now I can't save or share with my new Premium account, the 15.99 one.

What I discovered today was, all my devices, Android phone, Win 11 Laptop, and Roku TV all have the apps for Youtube, and save/share videos. My Win 10 Desktop uses the website. I tried Edge Browser, works fine. I figure it's Firefox issue, but I can't find so far.

Any help appreciated as I do not, want to give up my Firefox. Maybe someone here has run into similar, or anyone with a suggestion for me? What I tried already is below:

Cleared Firefox Cache
If I save a file in phone or on the TV, it does sync with PC
Logged out of youtube, then logged back in.
Closed, then reopened Firefox
All up to date on Win 10 22H2 (OS build 19045.7663), I bought the extended year.
Firefox is on 155.0.1 (64 bit)