Hi Robert, is it Gmail? Google doesn't have access to your Firefox Account email settings, so this is all about how to work with the website. By default, when given the standard Gmail URL, Google immediately opens the Inbox of whichever Google Account was the first to sign in during a previous session. You'll see in the address that it is "user 0": https://mail.google''.''com/mail/'''u/0/'''#inbox When you click the user picture in the upper <s>left</s> <u>right</u> of the page, you can use a menu item to launch the other signed-in account mailbox(es) in new tabs. I only have one configured at the moment, and it is "user 1": https://mail.google''.''com/mail/'''u/1/'''#inbox I think unless you sign out your wife's account, or set your account as the default, Google will keep that user order indefinitely. If you like, you can create personal bookmarks using this template (changing the "username" part to your address): https://mail.google''.''com/mail/u/'''?authuser=''username''@gmail.com''' That will save the step of having to use the menu for you and your wife no matter who is the current default user. Whether other parts of Google (like search and documents) might still be confused, I couldn't tell you, I almost never stay signed in to multiple accounts.

See also https://support.google.com/accounts/answer/1721977