User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0 (Beta/Release) Build ID: 20140605174243 Steps to reproduce: Load firefox 30.0 on Windows. Navigate to http://www.ro.me/ Box suggests will only work in chrome, click try anyway. Actual results: Black screen. Expected results: (Worked in ff29). Ro.me animation.

Confirmed on Mac. Firefox 30 doesn't show clouds, but 29 and 31+ do. The console says: > TypeError: console.log is not a function And if Firebug is activated, it works. Maybe Bug 998908?

Ahh, no, this is the culprit: > var console = console || function () {};

This presumably worked in 29 because that predated the fix for bug 965860. It works on non-release because we haven't landed bug 976920 there. The good news is that we have no plans to check in bug 976920 on 31, so I think we're good here for 31. Not sure whether we should try to do something for 30, especially if the only issue is this "I only work in Chrome, haha" site.

Added to the site compat doc: https://developer.mozilla.org/en-US/Firefox/Releases/30/Site_Compatibility#JavaScript

Since there is a site-side workaround, this is not a driver for a 30 chemspill and we'll see the fix ship in 31. see https://bugzilla.mozilla.org/show_bug.cgi?id=1024899#c9

Trying in today's nightly, I just see a black screen with music in the background.