Flash video won't play Topic is solved

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badnick
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Flash video won't play

Unread post by badnick » 2017-06-16, 20:52

This video does not play in PM even in clean profile but works in Firefox.
https://air.mozilla.org/webdev-beer-and-tell-june-2017/

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Moonchild
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Re: Flash video won't play

Unread post by Moonchild » 2017-06-16, 21:44

If you look at the web console (a first thing you should do if you want to check what's going on when something isn't working), you would have seen this is a CSP+CDN issue. You should let Mozilla know that their CSP sources are not including cloudfront.net when it should, preventing the Flash part of JWPlayer from loading...

Workarounds: disable flash or disable CSP (not recommended)

Technical details:
Error:
Error: Content Security Policy: The page's settings blocked the loading of a resource at https://d132d9vcg4o0oh.cloudfront.net/v ... .flash.swf ("default-src https://air.mozilla.org").
Their CSP is:
script-src 'self' 'unsafe-inline' 'unsafe-eval' cdn.jsdelivr.net air.cdn.mozilla.net vid.ly s.vid.ly cf.cdn.vid.ly ssl.p.jwpcdn.com ssl.google-analytics.com d132d9vcg4o0oh.cloudfront.net 4844a951.fanoutcdn.com;
img-src 'self' data: vid.ly air.cdn.mozilla.net secure.gravatar.com jwpltx.com ssl.google-analytics.com mozillians.org https://i0.wp.com d3fenhwk93s16g.cloudfront.net;
default-src 'self';
style-src 'self' 'unsafe-inline' air.cdn.mozilla.net;
media-src 'self' blob: vid.ly mozillalives-i.akamaihd.net d3fenhwk93s16g.cloudfront.net;
child-src 'self' blob: vid.ly http://www.youtube-nocookie.com login.persona.org;
connect-src 'self' vid.ly mozillalives-i.akamaihd.net autocompeter.com 4844a951.fanoutcdn.com wss://4844a951.fanoutcdn.com d3fenhwk93s16g.cloudfront.net;
font-src 'self' data: air.cdn.mozilla.net cdn.jsdelivr.net ssl.p.jwpcdn.com
Since d132d9vcg4o0oh.cloudfront.net is only listed in "script-src", and a .swf file is not a script file (falling through to default-src as a result), it should not load. As such the flash player gets blocked and the video borks because JWPlayer defaults to Flash for us, apparently.
i.e.: Pale Moon is doing exactly what it is told to do.
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Re: Flash video won't play

Unread post by badnick » 2017-06-17, 06:05

Yes, indeed is working by disabling Flash. Thanks Moonchild!
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LL25255252
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Re: Flash video won't play

Unread post by LL25255252 » 2017-07-26, 23:08

Moonchild wrote:Workarounds: disable flash or disable CSP (not recommended)
Yes, these 2 workarounds work for me too.

I don't often visit flash based sites but as of now (Pale Moon 27.4.0) setting the Flash Plugin to "Ask for Activate" doesn't work in that mozilla URL. You get the "Flash Plugin fail to Load" message without getting the "Allow flash question".
So, @Moonchild, can you make PM popup the "Allow question" so that I won't have to disable flash for all sites :?:
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