On: Ask HN: What's your favorite UI Mockup tool?

[naner]

Not available for Firefox 6.0

I do believe Firefox's frenetic update schedule just bit me in the ass.

EDIT There's a standalone version: http://pencil.evolus.vn/en-US/Downloads/Application.aspx

EDIT2 This add-on ("temporary branch") works with Firefox 4-6: http://code.google.com/p/pencil-ff4/

[ExpiredLink → naner]

IIRC, the standalone needed admin privileges. Maybe there's a no-install version.