Firefox Syncβ β β β βWorks on nearly every Firefox-based browser and can mix and match. Even IronFox and LibreWolf recommend using it, as itβs encrypted end-to-end.
Floccus Bookmarks Syncβ β β β β Very flexible, syncs across many different desktop browsers and mobile devices, and for privacy it can run on your own server or encrypted on another cloud service.
Nextcloud Bookmarksβ β β β βOnline web app for managing bookmarks using your own Nextcloud server. I usually use it indirectly as the storage for syncing via Floccus.
Pocket (discontinued)β β β ββI used Pocket for ages to better manage my time reading articles. Eventually I soured on the way itβs turned into a recommendation engine. And now Mozillaβs discontinuing it. Wallabag is a decent alternative for the read-it-later aspect.
Postmarksβ β β β βA self-hosted public bookmarks/linkblogging server (think Delicious or Pinboard) that can interact with Mastodon and the rest of the Fediverse.
Wallabagβ β β β βA read-it-later type service built on open-source software that you can run yourself if you want (but donβt have to). Not as polished as Pocket, but itβs sticking around, and you know itβs not using your saved bookmarks to train a recommendation engine.
Xmarks (Discontinued)β β β β βXmarks was a cross-browser bookmark sync service that I used for a long time to keep Chrome, Firefox, IE, and Safari on multiple computers using the same set of bookmarks. It shut down in 2018.