User Help for Mozilla Firefox
Apart from changing 'media.mp4.enabled' to 'false' in 'about:config',
which does Not allow Facebook Videos,
is there any other suggestion?
-Windows: 10 x64
-Firefox: 50.1.0 x64
-Adobe Flash: 18.104.22.168
Line across the bottom of the page mentions allowing cookies, video opened and then stopped for a download issue.
Do you use Windows 64-bit
Do you use Firefox 64-bit
Firefox 64 bit , no Windows or Wine crossover, Linux OS only, flash removed entirely.
Using VLC and Widevines.
This system also blocks a great deal of detritus, temporary players and cookies.
The video comes from a *legitimate* National Radio-Television Website.
There in Nothing *suspicious or hidden* with the respective video.
-With Firefox 32-bit, the video opens O.K.
-With Firefox 64-bit, the video doesn't open *unless*
changing 'media.mp4.enabled' to 'false' in 'about:config'.
Then, this change *negatively* affects Facebook Videos!
No Facebook videos!
For one more time, my system is Windows x64!
What happens with Linux or Mac OS is something beyond my interest...
New Adobe Flash Player version (22.214.171.124); same old problems...
Firefox 50.0.2 x64 cannot play the particular video.
Firefox 50.0.2 x32 can...
Have you tried the video from the source instead of Facebook?
as i told you before, there are problems with using flash player with the 64-bit versions of firefox..
find answers at "Mozilla Support":
Why the setting 'media.mp4.enabled' to false in 'about:config' allows the Video to play?
Makes me wonder: Is it Adobe Flash to blame on it?
Well... It's hard to explain...
Though I don't know about JW Player at all,
JW Player uses a media-type-specific 'provider' to handling the media, 'provider.flash.js' or 'provider.html5.js' or such. I can inspect it on Tools->Web Developer->Network.
As a fact, 'provider.flash.js' is chosen on Firefox-32bit(Google Chrome as well), but 'provider.html5.js' is chosen on Firefox-64bit. I'm guessing it is mischoice.
Then, I suspected if I could disable html5.video, 'provider.flash.js' would be chosen. At least "media.mp4.enabled=false" can force to choose 'provider.flash.js'. It is a trick. (so I wrote "will be able to see the video playing anyway somehow")
I don't think this is flash-problem.
Also, I'm doubtful this is firefox-problem.
See Web Console(or Browser Console) when the error occurred, there is a warning message such as
>HTTP “Content-Type” of “application/vnd.apple.mpegurl” is not supported. Load of media resource http://ep.ert.gr:1935/vodedge/_definst_/mp4:dvrorigin/2017/tv/news-themata/20170115-kypriako-news2100.mp4/playlist.m3u8 failed.
(this message itself is correct. it is not a bug but a spec)
I can view that video on Firefox-64bit(without modifying media.mp4.enabled) at
JW Developer - HTTP Stream Tester
(it takes a bit long time to start playing though)
I cannot investigate what causes the problem, JW Player version?(webtv site uses 7.8.4, stream tester uses 7.8.7(it loads 'provider.hlsjs.js')) site config? ad? bug in Firefox? I have no idea.
I tried to debug the web site to investigate why 'provider.html5.js' is chosen, but the Firefox built-in debugger is not useful.(and I'm not an expert) I'm stuck here.
It won't be controllable on user-side anyway. Asking for the web site or JW Player site, or submitting a bug report to bugzilla(since 32bit Firefox has no problem, there might be difference/incompatibility between 32bit and 64bit) is better, I guess.
(I'm using Google Chrome to view videos, btw)
Well, everything started when v50 of Firefox 64-bit released.
With version 49 or earlier versions of Firefox 64-bit,
there was NO problem in respect with viewing videos from this legitimate site:
http://webtv.ert.gr/katigories/eidiseis ... ko-deltio/
It may very well be the page itself.
Errors (37) ·
Attribute xmlns:v not allowed here.
Bad value 100% for attribute width on element iframe: Expected a digit but saw % instead.
The ___ attribute on the ___ element is obsolete. Use CSS instead. (8) · Hide all · Show all
The frameborder attribute on the iframe element is obsolete. Use CSS instead. (3)
The scrolling attribute on the iframe element is obsolete. Use CSS instead. (3)
The allowtransparency attribute on the iframe element is obsolete. Use CSS instead. (2)
Duplicate ID social-share.
Element ___ not allowed as child of element ___ in this context. (Suppressing further errors from this subtree.) (7) · Hide all · Show all
Element style not allowed as child of element div in this context. (Suppressing further errors from this subtree.)
Element a not allowed as child of element ul in this context. (Suppressing further errors from this subtree.) (4)
Element br not allowed as child of element ul in this context. (Suppressing further errors from this subtree.) (2)
Text not allowed in element ul in this context. (16)
An img element must have an alt attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images. (3)
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
The name attribute is obsolete. Consider putting an id attribute on the nearest container instead. (2)
The navigation role is unnecessary for element nav.
Attribute with the local name xmlns:v is not serializable as XML 1.0.
The first occurrence of ID social-share was here.
Hi, I recently got exactly the same problem with videos. Impossible to read any flash video and the flash plugin has crashed all the time. I identify and solved the problem after deactivated the Free Download Manager plugin. Since everything is fine for playing videos.
I'm using Win10 64bit and FF 50.1.0
JW Player doesn't work on 64bit Firefox with Flash plugin. (unless forcing to use it)
JW Player tests whether Flash plugin is available or not by using jwplayer.loader.swf and its ActionScript. Firefox is not supporting it or preventing it.
See Object Element Property Test
and look Web Console or Browser Console.
"ActionScript invoked swf.embedCallback()." can be seen on 32bit Firefox but not on 64bit Firefox. It causes drop "provider.flash.js" and pick "provider.html5.js" up.
Anyway, it doesn't work...
(http://webtv.ert.gr/ has updated JW Player to 7.8.7 in these days, btw)
Same error on 49.0 I tried.
You can try old version anytime. If you won't have problems with former version, you had better to submit a bug report to mozilla.
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