[WorldMaker]

Tried to open the demo and got an "Only Works in Chrome" error page. That doesn't give me a lot of confidence in the tool, as my audience for my UI should be larger than just one browser, and I know that I have to test in multiple browsers.

[writepub]

I don't think the output from this tool is necessarily non-compliant with other browsers. This tool/app itself might be - and I think it's OK given it's audience (web developers) who anyways overwhelmingly gravitate towards chrome for it's superior debug tooling

[jarcane]

I don't think the output from this tool is necessarily non-compliant with other browsers.

Their home page doesn’t even render correctly in Firefox.