Have been a longtime user of Mozilla and love the progress it made through the years. Would love to see the option to be able to close/delete synced tabs between mobile device and laptop, so that if some/more tabs were say opened on laptop (after being synced with phone) they could be closed via laptop (in the left sidebar you would just close the tab you do not need anymore and not go back to the phone and try and locate the tab to then close it there).