Great screening tool — not a replacement for real testing

I build and do QA on a lot of web sites and I love this thing. It’s not a replacement for a real testing tool like BrowserStack or Sauce Labs, but it’s a great screening tool for use during development before you run tests on real testing tools like that.

I was a little nervous when I bought it that it hasn’t been updated in a while, but it works fine in El Capitan. Supports full-screen mode.

I agree with another reviewer that it would be even better if you could manually set the user agent string. With a list of common pre-sets. That would make it five stars. It’s still useful without that.

There is a “resize pane” button with a drop-down selector that you can add with “customize toolbar”. That really should be included in the toolbar by default.

Ryan-in-Miami about Duo