uBookmark by SparrowHawk Australia

uBookmark is a universal bookmark manager, saves your favourite sites and gives you a secure access from every Mac computer and mobile device.

Save all your bookmarks to uBookmark, and it will sync your bookmarks everywhere you need them.

Requirements:
Operating System: macOS
Firefox Browser
uBookmark App

Please note that, this extension is not a standalone application. Do not install if your system doesn't meet the requirements above.