Rated 1 out of 5 stars

Unnecessary crap, just redirects to some validation webpage.

Rated 1 out of 5 stars

Useless app that can only check live sites. We want things checked during DEVELOPMENT.

Doesn't show + 404 Rated 2 out of 5 stars

After installing nothing happens, and the support site gives a 404.

Works Rated 4 out of 5 stars

Works as advertised, but only on live webpages (not local files), and the context menu appears even for pages that are not declared as HTML 5.

This review is for a previous version of the add-on (