I used to work with O'Notes, however it doesn't work with FF57+, so I had to try any other app, and tried Clippings.
Overall it does what it promises and I like the way with subdir structure (for that 3 stars), would be 5 stars if not these limitations:

- Can't use clips to insert in the any "Password" and some "Email" fields !?! - [why?];

- Can't pin Clippings main window to the Sidebar;