Just noticed today that Firefox on my work computer (Mac) is adding an icon to the MacOS Dock that opens the URL of the currently active tab from Firefox on my personal computer (also a Mac). Firefox on my work computer is signed into Sync w/ my work Firefox account and Firefox on my personal computer is signed into sync w/ my personal Firefox account. This is crazy and unacceptable. I have not previously signed into my personal Firefox account on my work computer, the Connected Services section of the Firefox Account Settings for my personal account does not show my work computer and the Connected Services for my work account does not show my personal computer. Both computers are on the same physical network, but do not otherwise interact.