F

firefox-addons

Provides an pop-up menu, displaying the bookmark's path, and allowing quick moves to a choice of folders.

Extracts metadata from each page's HEAD, and makes it available to other add-ons, so they don't have to scan each page themselves

A collection of related button add-ons. Each one navigates to a page linked to the current page.

Indicates bookmaked pages, bookmarks with similar URLs, duplicate bookmarks, and history information about the current tab. Experimental treemap view of all bookmarks.

Focused browsing is a web extension that helps you focus on your creative and professional goals by hiding distracting web elements on popular social websites.

https://org.grey.software/focused-browsing

The project is not for nor against Mozilla and this is by no means meant to smear Mozilla or their products - or their Dev Team - it is an overview.