The zotero main program is now a standalone thing, but there's a webextension that lets you add things to your library. Looking into it, it seems you can get a rudimentary experience with a bookmarklet/jseval:

https://www.zotero.org/downloadbookmarklet

I'm glad that Greasemonkey support is coming, though. Will the GM scripts run in the same JS scope as page scripts?

Webkit forks also render text slightly worse for HiDPI screens and don't seem to support CSS `hyphens: auto`. Which is annoying because I really like justified text.