Hi I really like your app, but I think it could be made a lot easier to use if you made use of the 'share' menu in the MacOS. At the moment if I want to download a pdf and then work on it in MarginNote I have to save the file using 'Export to pdf'. It would be much easier if I could simply send it from Safari to MarginNote. Once the extension is enabled it would also mean that you could open a pdf in Preview and then send it to MarginNote, or send it from Safari to EverNote and then from EverNote to MarginNote (and lots of other combinations).

I've attached a couple of screenshots of the Share Menu just in case.