I have several gmail accounts.  Friends, business and junk, are the 3, but lately when I want to check them from a link in my bookmarks I only get whichever one I'm logged in on Firefox.

So I have to sign out and sign in on each of the other 2.

I don't like to use Thunderbird unless I log off the computer and log back on because there's some conflict with my TV driver, I think.  On occasion if I don't clear the computer this way I get the BSD and I don't want that.

Each email has a different password too.

I'd like to somehow lock this down, it didn't do this until the last few months.