Hello, I've looked through the help docs for FF sync and Apple Handoff but am not sure which (or both?) of those may be causing this. With both devices on and FF open, and on the same wifi, there appears an additional FF dock icon that when clicked opens up one tab from the other device. How can I turn this off? Super annoying and not useful at all. I have FF sync turned on and it's so easy to grab an open tab from another device via sync. Thank you all for your time and help!