User Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/17.0 Firefox/17.0 Build ID: 20120810030512 Steps to reproduce: Go to this adress http://cnettv.cnet.com/dell-xps-15-hands/9742-1_53-50129172.html and wait for the video to play. Actual results: The video never show, in fact the video player never shows. Expected results: The video should play. The firebug console show me this error: TypeError: N.getNext(...) is null ...mousemove:this.bound.check,mouseup:this.bound.cancel});this.document.addEvent(th... in http://asset0.cbsistatic.com/cnwk.1d/html/rb/js/tron/cnettv/cnettv.tron.frontdoor.compressed.js line 4

Confirmed in OS X 10.6 nightly. This page works in 16.0a2, so a regression window would be nice.

Last good nightly: 2012-08-04 First bad nightly: 2012-08-05 Pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=20fc34efd733&tochange=9453cf029b72

Regression window(m-i) Good: http://hg.mozilla.org/integration/mozilla-inbound/rev/aa100b9efcca Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/17.0 Firefox/17.0 ID:20120803104127 Bad: http://hg.mozilla.org/integration/mozilla-inbound/rev/87e7abe891a9 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/17.0 Firefox/17.0 ID:20120803113827 Pushlog: http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=aa100b9efcca&tochange=87e7abe891a9 suspected: Bug 772733

It does seem to be using a .contains() method on String a few times. I don't know how worked originally. Browser detection gone wrong?

I just test Firefox 14 with the user agent of Nightly and the video works, is not the user agent.

String.contains defines in http://asset3.cbsistatic.com/cnwk.1d/html/rb/js/tron/oreo.moo.rb.combined.js So , does MooTools conflict with Bug 772733?

It looks like MooTool's contains() is incompatible with ES6's.

MooTools' bug submitted: https://github.com/mootools/mootools-core/issues/2402

I should note only Mootools 1.2 is afflicted. Mootools >= 1.3 is fine.

Well, Cnet changed their website. Now it seems to be fully compatible with Firefox 18. We'll see if it stays that way.

Great!

Alright. So that was a one time thing, and they are now back to the old layout. This means, of course, it no longer works. This is getting quite annoying.

I started tracking firefox-19, as the problem is still there.

(In reply to infinitefirefox from comment #16) > I started tracking firefox-19, as the problem is still there. WFM.. latest hourly cset: https://hg.mozilla.org/mozilla-central/rev/ec10630b1a54 win32 m-c trunk on win7 x64

Indeed, they're still using MooTools 1.2 AFAICT.

Is anybody still able to reproduce this? I can't in the latest 10/16 nightly using the URL in comment 0.

Videos do indeed work. However the slideshow is still broken. Since all slideshow related issues seem to be forwarding here, I don't think we can resolve the bug. Although, since the two issues seem to not be related anymore, perhaps we should close this one and open back up the others.

Alright. I believe this issue is resolved. I'm going to reopen my Slideshow issue though.

Not tracking it for release as the issue no longer happens based on comment 20