I use jrnl (https://jrnl.sh). I have a bookmarks journal called "bm", so I can add a new entry with notes by entering `jrnl bm` in my shell.

It supports tagging and searching, stores everything in plain text, has optional encryption, and is FOSS. I've tried a lot of the solutions in this thread and so far jrnl has been the "just right" solution for me.