Best web browser extensions?

[Sean.ivity]

Just curious what extensions people find useful and use on a regular basis.

I personally Use Google Chrome with Ad Block, ImageBlock (at work), mighty text, spell checker, and overlay blocker (Close any popup even if the "X" is hidden). Are there any im missing out on?

 

[EL PRESIDENTE]

I use chrome.

Frequently use Google Voice and Evernote Web Clipper.

 

[Denny Crane]

Just a resized widget.

And I've been using Safari for browsing.