I have two suggestions for the favorites feature.
1. Add "Add/remove to favorites" item to table context menu.
Explaining: This will ease adding table to favorites (without it I have to turn off filtering, find the table in list, click star and then turn on filtering).
Alternatively, If "Show only favorites" enabled, and currently opened table is not in favorites, show an extra row with currenly selected table.
2. Make favorites tables list common for all databases and all connections.
Explaining: I have three identical databases: two local (for development and testing), and one remote database (for working site), and I have to star tables three times.