1. StumbleUpon toolbar (for registered SU users).
Most useful features:
- review, vote for and tag any page you visit;
- search for pages submitted by your friends;
- browse through submissions within a channel (e.g. Flickr);
- quickly access your favorites;
- see and analyze a page SU ranking withing search results.
2. SocialPhile – displays page Digg rankings withing search results:
Most useful features:
- find pages that were popular at Digg;
- instantly access Digg submission page to view the discussion and reviews.

3. ShareAholic – lets you submit and view submission progress at a number of popular social media sites:

4. Co.mments button – track comments at social media sites that do not allow automatic tracking (e.g. Sphinn).
5. TwitterFox (and the like) allows for quick and easy communication at Twitter.
Most useful features:
- highlights replies to you @;
- updates you of your unread messages;
- let you quickly send private messages.
Great list. We are a bit unpleased with the lack of option some bookmarking sites provide. So many REQUIRE the plugin and give you no option to manually submit here and there which is a big pain. But these are great sites/plugins so kudos.
This time I go with shareaholic. Good post again :-)
Thanks for the list, Smarty.
Pratheep
That digg plugin is cool. Im going to add that one for sure.
Thanks!
I know this is an old post but i’d love to use the SocialPhile plugin. However it appears not t be working. This to do with the last firefox update? Does it work for anyone else?
I was looking for an article on this exact subject.
Thanks a bunch!
looking little bit interesting keep it up
By: Dhaval patel
Hi,
Thanks for sharing , really cool article
Firefox social bookmarking is very useful and popular now. Thanks for sharing this information