For Firefox 57 or later, please use the following.
https://addons.mozilla.org/firefox/addon/online-bookmark-inc-search/
This extension is a incremental search UI Pinboard(http://pinboard.in/ ),
- Incremental search from title, notes, tags for Pinboard bookmarks. Match bookmarks show list and match keywords highlight.
- You can search of input multi keywords, Supported operators AND("keyword-a keyword-b"), OR("keyword-a|keyword-b"), NOT("!keyword").
- Using keyboard shortcuts, You can find bookmarks very quickly.
- Bookmarks load from Pinboard(http://pinboard.in/ ) are stored in your local computer for quick loading later.