Video in Firefox support

kenneth's Avatar


10 Apr, 2017 09:37 AM


I found a bug in the following scenario:

Using: Royalslider 9.5.8, jQuery 3.2.1, Firefox 52

I have a slider with an included YouTube video and the problem is that sliding does not work at all including thumbnails, arrows, dragging. I found that you have an undocumented property for video called: disableCSS3inFF that is turned on by default. I found that turning this OFF will actually solve the sliding issue. I suspect that CSS3 support has been fixed in later versions of FF.

I suggest that the default value for disableCSS3inFF is true or that the property is removed.

  1. Support Staff 1 Posted by Dmytro Semenov on 10 Apr, 2017 02:03 PM

    Dmytro Semenov's Avatar


    Hm, I can't replicate on my side for some reason. Mac or Windows?

    Can you please link to the page that reproduces the problem? I've made the discussion private.


  2. 2 Posted by kenneth on 10 Apr, 2017 02:05 PM

    kenneth's Avatar

    This was on Windows. The problem was found in a production environment and is now fixed by setting disableCSS3inFF to false so its not publicly visible anymore unfortunately.

    Could you at least document the disableCSS3inFF flag for future reference?

  3. Support Staff 3 Posted by Dmytro Semenov on 10 Apr, 2017 02:30 PM

    Dmytro Semenov's Avatar

    Can you replicate the issue on this page - ?

    Could you at least document the disableCSS3inFF flag for future reference?

    It's not available in public list of options for a reason - the option might be deprecated in future. And I strongly don't recommend to blindly disable it if you have videos in slides, as older versions of FF (including mobile FF on Android) still have this bug. Unless, of course, you support only the latest FF...

  4. 4 Posted by kenneth on 11 Apr, 2017 06:19 AM

    kenneth's Avatar

    Yes, i replicated the issue by adding jQuery 3.2.1 and jQuery migrate 3 to the fiddle:

    In my case i realy need to support the lastest FF. It is bad if it fails in older FF but its still more important to support the lastest than the older versions.

  5. Support Staff 5 Posted by Dmytro Semenov on 11 Apr, 2017 11:58 AM

    Dmytro Semenov's Avatar

    Hm, interesting, so the issue seems to be related to jquery-migrate 1.3.0.

    I tried using a newer version of jquery-migrate (1.4.1) and it seems to work , can you confirm?

  6. 6 Posted by kenneth on 11 Apr, 2017 12:12 PM

    kenneth's Avatar

    No, i was using jquery-migrate-3.0.0.js which is compatible with jQuery 3.0+

    jquery-migrate-1.3.0.js and 1.4.1 is used with the jQuery 1.xx branch

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