I've been on a long journey lately to migrate any and all of useful to me cloud-based services to self-hosted ones...
One of the latest check marks - hundreds of semi-permanently-open browser tabs have finally been moved to a local wallabag instance - https://wallabag.org/
It is a "read-it-later" kind of service to store web pages and such, but local. I'm still testing it with a default SQLite backend, but it can store to MySQL, PostgreSQL, etc.
