What does your feature entail? What is it for? How will it affect existing workflows or user experience?
When I open a secondary folder inside a bookmark, opening it again should remember where I last opened it. that's how Safari does it, and I'm sure it would be more convenient!
What are the exact ways that you see a user using your proposed feature? Please go into as much detail as possible, and provide examples of how other browsers/apps implement this feature, if applicable. If your feature suggestion adds on to an existing feature, how would it work into it to extend its usefulness?