After upgrading to Firexfox 35.0 all vine videos, instagram videos and some webplayer videos dont work anymore. I get messages like: ERROR 1 -Error Loading Media: File Could Not Be Found http://i.imgur.com/5OaxOFC.jpg ERROR 2 -Video can't be played because file is corrupt. http://i.imgur.com/cqRpJOp.jpg Before I start, I will like to point out some things Ive tried already so this doesnt end up being a back and forth of things already tried. *Ive uninstalled adobe flash player *Ive tried the whole media.windows-media-foundation.enabled to false or to true *Ive gone into safe mode and nothing *Ive tried toggling off the plug-ins to see if anything I have problems with works. Nothing. All the media that plays from different various players: https://www.youtube.com/watch?v=v7IXmV6A6Bk http://bestanimes.tv/mushishi-zoku-shou-2nd-season-episode-10/ http://www.watchcartoononline.com/mushishi-episode-26-english-dubbed <-- 2 embedded videos that both play. All the media that wont play: http://www.jwplayer.com/ <---- that front page video : I get ERROR 1 for this http://videomega.tv/?ref=AJWOLaJQKbbKQJaLOWJA <--- I get ERROR 1 for this And every vine and instagram video. Since I will be asked to post something from it here is something from vine and something from instagram https://vine.co/v/OqxKQBJd3lm <---- I get a still image http://instagram.com/p/up3CG6ooDP <----- I get error 2 if I go into page info and click the media tab and look for the video. All my enabled plugins: http://i.imgur.com/9fCZ1s2.jpg Everything on my permissions even on the pages of the media I cant play is set to : Use Default. Now, I thought this was just some kind plug-in problem, I even thought it was just something with the updated made Firefox incompatible with some of the webplayers. Of course I found out this was wrong. Keep on reading: If your flash plugin crashes or if you terminate/end process in the Task manager, your video will be replaced by this grey message: http://i.imgur.com/vudnNIM.jpg https://www.youtube.com/watch?v=v7IXmV6A6Bk http://bestanimes.tv/mushishi-zoku-shou-2nd-season-episode-10/ http://www.watchcartoononline.com/mushishi-episode-26-english-dubbed http://www.jwplayer.com/ http://videomega.tv/?ref=AJWOLaJQKbbKQJaLOWJA Now, all these videos I listed before, If I had them all open in tabs and then proceeded to terminate my flash plugin in Task Manager, they would all be replaced by that grey message window that the plugin crashed. Now, after I updated firefox to 35.0, if I did the same thing https://www.youtube.com/watch?v=v7IXmV6A6Bk http://bestanimes.tv/mushishi-zoku-shou-2nd-season-episode-10/ http://www.watchcartoononline.com/mushishi-episode-26-english-dubbed These three would show that grey message and these are the ones I can play But these 2 the ones I have a problem with. http://www.jwplayer.com/ http://videomega.tv/?ref=AJWOLaJQKbbKQJaLOWJA they wont even be affected by it. Its like they arent even using the flash plugin. Whenever I would terminate/end process my plugin from my task manager in 34.0 EVERYTHING, EVERYTHING would not work including every vine video and instgram video, it would either show that grey message that says the plugin crashed or it would not work. They would all work again when I refreshed the page. Everything, in 34.0 in my firefox was using the flash plugin. Now, as I stated above I thought it was just some kind of webplayer and firefox 35.0 conflict that was causing these problems. Until I saw this: http://www.watchcartoononline.com/mushishi-episode-26-english-dubbed http://i.imgur.com/gCaUMXm.jpg http://i.imgur.com/V9w7ulS.jpg http://www.jwplayer.com/ http://i.imgur.com/dqZtoTX.jpg They are both using the same exact webplayer. THE SAME ONE. I can play the first one but the video in the front page of http://www.jwplayer.com/ I cant play it. Which brings me to my final conclusion. The reason I cant play some that fron page video of http://www.jwplayer.com/ videos from videomega.tv and instagrams and vines IS because of their file extension, their file types. I went to the firefox options and clicked the Applications tab: http://i.imgur.com/uWWKelX.jpg http://i.imgur.com/HYBjwdZ.jpg http://i.imgur.com/IK4C2WR.jpg Shouldnt all those video file types be in : Use Shockwave Flash (in Firfox) instead of : Always ask ??????????????????????????? When I try to toggle it to something else I dont even get the option to use Shockwave Flash http://i.imgur.com/gTH18S1.jpg In Conclusion, what gives?? -In 34.0 Everything worked. -If I terminated/ended process the Flash plugin in 34.0 everything would be affected by it , either by not working anymore or showing me that grey crash message. -This all started when I upgraded to 35.0 -Has nothing to do with webplayer conflicting with 35.0 as proven above. -The reason for all of this not working is the type of video extension they have. Judging from the examples I gave of the things I cant play, it would seem I cant play mp4, flv and whatever vine uses. Which I think its mp4 as well. Anyways, how do I fix all this so it works like it did before I upgraded to 35.0