This is something that has been driving me crazy in Firefox for a long time and I don't understand why this isn't a standard feature. One of my favorite features is the ability to create custom bookmark keywords for my bookmarks. This is normally done by opening your bookmarks, right click --> properties and there you have the option. This is very cumbersome and my wish is to be able to set these keywords right when I'm first creating the bookmark. There used to be an old extension that allowed this functionality. There also was a way to do it by modifying userChrome.css see here: https://lifehacker.com/5738698/add-bookmark-keywords-to-firefox-from-the-address-bar Now when I try this userChrome.css method it doesn't seem to be working for me. I can see the keyword field when creating a bookmark, but it's not saving my changes. I really wish this was a core feature and not something I have to hack into firefox everytime I start a fresh install. Bookmark keywords is a great feature, and I don't understand why the devs make it so inconvenient to use.