11.27.21 iMac - OS10.11.6 El Capitan - Firefox 78.15 I have spent hours searching internet and Mozilla support. Nothing. All I want to do is switch my sign in accounts. I have two. Firefox confirms this. When I go into Accounts, following existing procedures to establish a second sign in, I type in second email with response telling me this account already exists. I know that. I can even see it in the Passwords/Accounts section. But nothing, nothing appears anywhere telling me how I can simply switch from existing sign in to the other. Nothing. If anyone at Firefox would care to explain the secret, I would appreciate it so I can stop wasting time searching this solution. Don't use euphemisms like some instructions do which only confuse simple answers. Please simply state Step 1, Step 2 etc One such support page said something like select one account and click "Preferred" or the like. Saw nothing like this in my Account settings. thanks Larry