Yes, it’s a very Netscape-era approach. 
A neat trick with Scrivener is that it actually has a Bookmarks feature. While of course its bookmarks can store links to other areas of the project, files on your system, and other such things, it can of course store lists of links to the web.
So a very simple idea is to make a card for a topic, open its Document Bookmarks list in the inspector, and start collecting links for it. Even just one card per link isn’t wasteful, and with the synopsis it gives you room to annotate the purpose of the list or topic. Naturally since it can link to other cards within these lists, it opens the way for cross-referencing between topics, too.
You should be able to drag and drop straight out of the browser address field into this area, or copy and paste URLs (on a Mac anyway).