Until now, I wasn’t using many Firefox extensions to manage my work duties. I’ve been making efforts to increase my productivity with such shortcuts and utilities, though, so here are the extensions I’m finding most helpful:
Firebug is a mainstay for web developers, but I’m finding it useful in ad operations as well (speed testing, page element analyzing, CSS tweaking).
Page Saver captures full length screenshots of entire webpages (so above and below the fold, all the way to the footer). That lets you preserve design executions in their original form versus slicing them up into screen-sized shots.