The Firefox (and Chromium) bookmarks storage and sync systems still don't persist tags!

"Allow reading and writing bookmark tags" https://bugzilla.mozilla.org/show_bug.cgi?id=1225916

Notes re: how this could be standardized with JSON-LD: https://bugzilla.mozilla.org/show_bug.cgi?id=1225916#c116

The existing Web Experiment for persisting bookmark tags: https://github.com/azappella/webextension-experiment-tags/bl...