YouTube now requires Login and MFA every time I leave the Browser!

Hi still a Noob here running OS 18. I recently tightened security on FireFox and may have precipitated the required YT login and MFA every time I exit FireFox browser. YT is my go-to for news and general consensus on any topic. YT is even the reason I'm on Zorin right now instead of Win11! So, it is a royal pia signing back in every time along with a text to my phone for confirmation. Must I add Google browser to regain auto-login again? ...or have I possibly closed a door when I increased some privacy settings? As always, thank you for your thoughts..., Bill

It would be good to know what You did.

Without it, I would think that maybe the Cookies/Website Data get deleted when exit the Browser. And then Your are logged out.