.mov files no longer display in FireFox on my MacBook
I have a website I developed which uses Quicktime .mov movies and that is local on my MacBook Air. I have been using Firefox without problems in the past; however, version 52.0.2 will not display the movie. The web page opens, but it's totally blank. I'd appreciate any suggestions for how to solve this problem.
Additional System Details
- Shockwave Flash 25.0 r0
- User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:52.0) Gecko/20100101 Firefox/52.0
Could be a problem with sandboxing.
- Bug 1321724 - [e10s] Local HTML cannot be opened in Firefox 50
Please do not comment in bug reports
You can disable multi-process windows in Firefox by setting these prefs to false on the about:config page.
- browser.tabs.remote.autostart = false
- browser.tabs.remote.autostart.2 = false
Maybe another issue is: is your Firefox able to play .mov media natively without QuickTime, because the regular release of Firefox 52+ only allows one plugin, which is Flash. The Extended Support Release (ESR) of Firefox 52 will still run Java, Silverlight, QuickTime, etc.
More information on this change and where to get the ESR version of Firefox: Why do Java, Silverlight, Adobe Acrobat and other plugins no longer work?
From your perspective as a website publisher, this may be the end of the road for .mov media as a practical matter, unless you are okay with providing download links to play it offline in QuickTime or VLC. For web usage, H.264/MP4 is widely supported now.