In no particular order. (Although I do love Cooliris)
1:Cooliris https://addons.mozilla.org/en-US/firefox/addon/5579
A great way to view online photos and videos (Flickr,Youtube etc) and "Discover" the News, Movie reviews etc section is very nicely done.
2:GooglePreview https://addons.mozilla.org/en-US/firefox/addon/189
Inserts thumbnails for websites on Google, should be standard IMO
3:Fast Dial https://addons.mozilla.org/en-US/firefox/addon/5721
Quick and easy
4:Screengrab! https://addons.mozilla.org/en-US/firefox/addon/1146
Saves what you can see in the window, the entire page, just a selection, a particular frame... basically it saves webpages as images.
5:Who is this person? https://addons.mozilla.org/en-US/firefox/addon/1912
Gives you info from Wiki and others on the name you've highlighted on any website.
6:Tabscope https://addons.mozilla.org/en-US/firefo ... pe&cat=all
Simply does a preview popup for your Tabs.
7:Flagfox https://addons.mozilla.org/en-US/firefo ... ox&cat=all
Displays a country flag in the status bar depicting the location of the current website's server.
HHAD is in America.
