Not an extension, but I like http://pinboard.in/

It's just under $10 for life (of the company). Does what it says on the tin.

There are extensions, some official: http://pinboard.in/resources/

The only thing I miss is that my bookmarks no longer play in my firefox addressbar, but I've gotten used to it.

What I really like is that there's a duckduckgo bang code.

ctrl-k !pb term

gives you a list of all your bookmarks tagged with "term" followed by all the rest of your bookmarks that have "term" somewhere in the URL, title or description. Of course that works from any browser anywhere, as long as you're logged in to pinboard.

The extension on firefox works well enough, I assume on chrome also.

Yes. They don't self classify in any remotely useful way.

// But I'm using Pinboard.in, with multiple bookmaklets to auto add to a given tag with one click. My "tag this as devops" bookmarklet:

    javascript:q=location.href;p=document.title;void(t=open('http://pinboard.in/add?later=yes&tags=devops&noui=yes&jump=close&url='+encodeURIComponent(q)+'&title='+encodeURIComponent(p),'Pinboard','toolbar=no,width=100,height=100'));t.blur();

I'm still persevering with delicious.com, which went downhill after the AVOS buyout but has improved considerably since then.

It's still not up to the standards that were acheived under Yahoo!'s ownership but I haven't yet found an alternative that gives me: a great Firefox extension, networks, good tag suggestions and an API.

Pinboard, Diiigo and Evernote are good but they don't fit with my workflow.

I've been using Session Buddy (www.sessionbuddy.com) for a few months now. It (optionally) automatically indexes your open tabs during a browsing session under their respective windows. You can go back later and label or augment these sessions with further browsing. This isn't exactly what you're asking for obviously, but you may find it useful anyways.

Also, checkout http://www.readability.com/.

Give my side project a shot! http://jabjot.com/

It has bookmarking, note taking, to-dos, Dropbox integration, keyboard shortcuts navigation, API, and much more, plus it's free.

Some sign-on feedback -> You have a lot of features listed I might want so I thought I'll check it out. I stopped once you said I need to "register" or "login". If I could have tried it out, I might have if it had seemed worth it.

Hi Ravi, thanks for the feedback! What do you mean? Like let you try saving some bookmarks without signing in or signing up?

I use pinboard. However, I have to agree that there's a lot of room for improvement in this area. Some people tell me that Evernote also works well for this.