Do you or anyone else have thoughts on if Zotero would be too much for someone who doesn't need to write papers or cite documents? A large component of my day-to-day work is doing a lot of research and managing it for the duration of the project.
I highly recommend it, even for this use case. It takes a bit to get used to in how it works and setting so that it works well for your given workflow. For example, I'm a latex user so I had to add extensions to zotero so it can output to bibtex. But again, it wasn't that bad. Once its set up and you used it a few times, it easy and super useful.
I use it not only for web bookmarks, but as my main 'library' for all my documents. Even random scanned docs or even funny gifs I will store in zotero because I can tag them and put in notes so they are easy to find later.
Yep, constantly. That's how I use it instead of bookmarks. It also has extra functionality for certain cites like google scholar to make it easier to save journal and conference papers.