Right now, I've gave up on silly tags like "Postgres" or "Python". Currently, I'm trying to adapt the bookmark concept into different uses cases. The main one is sessions, but I have a few others niche ones, like "read later" and "a tool a day".
Honestly, my takeaway from managing my bookmarks, is that, snapshotting a session, is the closest thing I have to a "hot" start. I instantly recognize what I was working on and I remember why I opened/kept open those tabs.