I CANNOT GET FIREFOX GOING. I HAVE AN ACCOUNT

I KEEP CHOSING "ORGINAL ACCOUNT". IT KEEPS PROMPTING ME TO ""SIGN IN"". BUT IT DOESN'T GIVE ME ANY PLACE TO SIGN IN AT. THE BROWSER IS DEAD. I'VE BEEN WORKING ON THE PROBLEM FOR HOURS. MAYBE IT IS A PERMISSION, A STARTUP SETTING, THIS LAPTOP, WINDOWS 11 OR A COMBINATION OF ALL THESE THINGS. I DOWNLOADED "BRAVE" BROWSER AND IT WORKS FINE. I DON'T KNOW WHAT TO DO. I CAN LOG INTO MICROSOFT, GOOGLE, BUT MOZILLA IS LIKE, REALLY REALLY DEAD. ANY HELP IS OF COURSE APPRECTIATED. PHONE: [edited] MIKE [edited] @GMAIL.COM OR [edited] @HOTMAIL.COM /edited phone# and emails from public community support forum.