Browser Extension

Snap Links Plus lets users select multiple links, checkboxes, and other page elements, then open links or toggle selected boxes.

Amino provides a live CSS editor in a browser extension, letting users customize websites with persistent styles and create themes or skins.

Users can store and organize bookmarks with GGather, keeping sharing optional for saved collections.

Save, share, and organize bookmarks with Symbaloo, a homepage and bookmark manager with an educator-focused title and description.

GoFullPage captures full-page website screenshots and lets users crop, edit, annotate, export, or copy the image.

BetterViewer replaces the built-in image viewing mode in Firefox and Chrome-based browsers.

booky.io is an online bookmark manager described as simple, personal, and private, with details limited by a page requiring JavaScript.

Linkhorse provides a bookmark organization service, though the available page facts offer no further details about its features.

This GitHub list collects Hacker News apps, libraries and resources, including readers, feeds, extensions and APIs.

Bort lets users add bookmarks individually or import existing browser bookmarks; its tools page lists related browser extensions.