10.14.5 Beta - Firefox - iMac Pro - Some videos are corrupt

Discussion in 'macOS Mojave (10.14)' started by bplein, Apr 26, 2019.

  1. bplein macrumors 6502a


    Jul 21, 2007
    Austin, TX USA
    Hello all!

    I just recently noticed that when using Firefox on my 2017 iMac Pro (AMD Vega 64), some videos played by FireFox are corrupt, as in a single solid block of color (my examples are all a dithered orange color).

    Here is a screenshot of an animated graphic (actually hosted as video on a CDN run by Vimeo) from https://unifi-protect.ui.com




    The video clip used for the animated web element is here: https://player.vimeo.com/external/2...91c7c2abc093ce2b7581a6a7ee74a1&profile_id=165

    Safari and Chrome show it correctly. My work laptop (MBP, macOS 10.14.4) shows it correctly in all browsers.

    I can't go back to 10.14.4 on the iMac Pro, in part due to the fact that the iMac Pro has boot issues with 10.14.4 that aren't solved yet (but are working in 10.14.5, see https://forums.macrumors.com/threads/10-14-4-bootloop-on-t2-macs-imac-pro-and-others.2175186/).

    Has anyone seen this before? I've deleted Firefox, removed my ~/Library/Application Support/Firefox directory, and reinstalled, and the same issue persists.

    Thanks in advance.
    --- Post Merged, Apr 26, 2019 ---

    I updated Adobe Flash (because Firefox said that my Shockwave was out of date), and now I have GREEN corruption, not orange-dithered.

    --- Post Merged, Apr 26, 2019 ---
    Well, green is if Firefox hardware acceleration for video is disabled. If I enable that setting, it goes back to the original orange.

  2. Giffel macrumors newbie


    Jul 11, 2017
    Having the same problem on my iMac with 10.14.5 beta and Firefox :(
  3. avz macrumors 6502

    Oct 7, 2018
    MacBook5,1 with 10.14.5 Beta 3 does not have any problems playing this video in Firefox.
  4. BlaqkAudio macrumors 6502

    Jun 24, 2008
    New York
    There was a change in beta 3 that affects Firefox's sandboxing. The fix is already in Firefox Nightly and I think they're trying to get the fix added for the next Firefox Beta build on Monday

Share This Page

3 April 26, 2019