"if the current web page uses OpenSearch to point to a search engine, Firefox shows a blue circle next to the search box. You can add the search engine to your list using only two clicks." I tried this with FriendFeed and it worked like a charm; the UI is nearly impossible to tell that's wha the blue circle means though. - Benjamin Golub

The discontinuous text works with the FriendFeed bookmarklet too. Nice! - Vince DeGeorge

I just discovered the shortcut for selecting specific tabs. Cmd+1 Cmd+2 etc. I've used Cmd+~ to tab through but HUGE discovery for me. - Andrew Smith

Cmd+# is a cool feature, but not new in Firefox 3 :) - Michael C. Harris

i feel somewhat obligated to point out that IE7 has done this since launch... if the page your viewing supports opensearch, then the little arrow next to the search box turns orange, when you click it, the search provider is there starred, if you click the provider, it adds it to your list of providers. also, Ctr+e puts the cursor in the search box, and ctr+down pops open the list of providers. - Chris Hollander

Funny/sad that the browser I use most, WebKit (nightlies), doesn't support OpenSearch. - DeWitt Clinton

Cool features and shortcuts can be found at: http://i-stuff.blogspot.com/2008... - Kevin

Firefox 2 changed the color of the search icon on OpenSearch enabled sites, too - Nick Lothian

When will us Mac users get a version of Firefox that doesn't feel like it was ported from Windows/X11? There still seem to be random mouse-cursor-handling bugs all over the place. Maybe I'm the only one who notices. - Jim Norris

I definitely am noticing some bugs in the way right-clicking is handled (or rather, not handled) on some links - Charlie from twhirl