Fav is a bookmark manager that supports tags, multiple profiles, syncing to Github Gist, sharing, backup/restore of the bookmarks, and multiple browsers.

The bookmark manager:

It supports any version of Firefox, Safari, Chrome, Opera, and other web browsers.

Add bookmarks:

You can add a bookmark for each site in just a few clicks. You can also make use of the built-in support for any website.

View your bookmarks:

View your bookmarks in the Favorites panel.

Sharing:

Add bookmarks to Favorites or History, and share them with your friends or colleagues.

Filtering:

Tagging and filtering:

Tag bookmarks by making use of a built-in tagging system. It also allows you to filter bookmarks by tag later.

Backup and Restore:

Fav lets you quickly back up and restores your bookmark.

Views in sync:

View bookmarks in Favorites or History, even if you use another browser.

Downloading and installing:

Fav can be downloaded for free and runs perfectly on any device that is capable of running Firefox, Safari, Chrome, Opera, and other web browsers.