To work from home, my work Gmail account was added last year. Firefox is my default browser. I open Firefox, select Gmail & my home email account. It opens fine. It is the only tab open in Firefox. When I close the tab, my work account appears. If I open my home & then my work email, they both work. I close each one & after that, the inbox of only the work account appears. The normal operation always required opening my personal email first. Using my work account, required an extra step. If I do not take that step, and only the personal account is visable, when I close the personal account. the work one appears. This does not happen in Edge or Chrome.