I do, but only for frequent things, and I'll clean that out periodically.
For longer term bookmarks I use pinboard.
I use a middle-ground for a few things: I may bookmark, say, news sites in pinboard under the "news" category. Every tag and combination of tags on pinboard has an RSS feed; I bookmark the "news" tag's RSS feed in Firefox, and everything tagged shows up.
The RSS is not for the content of the target sites, it's for what goes in and out of the news tag. So I might add another news site to my pinboard news tag, and vi-ola, it shows up in my Firefox RSS bookmark. Delete something from the pinboard tag and it's gone in Firefox.
For longer term bookmarks I use pinboard.
I use a middle-ground for a few things: I may bookmark, say, news sites in pinboard under the "news" category. Every tag and combination of tags on pinboard has an RSS feed; I bookmark the "news" tag's RSS feed in Firefox, and everything tagged shows up.
The RSS is not for the content of the target sites, it's for what goes in and out of the news tag. So I might add another news site to my pinboard news tag, and vi-ola, it shows up in my Firefox RSS bookmark. Delete something from the pinboard tag and it's gone in Firefox.