Firefox 技術支援討論區

I have Windows XP and Firefox 52. Starting yesterday, I was no longer able to play videos in Youtube with either Flash or HTML5. Today I found out I can't play videos in Vimeo or Dailymotion either. How do I fix this?

Hello Sir or Madam or Mister or Miss, is it possible to add in future version, "brightness" and "contrast" controls for the built-in HTML5 video player? And maybe also add "RGB" Red / Green / Blue controls ? Thanks if you will add these controls for the built-in HTML5 video player.

When I click on an ESPN video, I get a grey screen. The sound works and the video appears to run, but nothing shows. When hover the mouse over the progress bar, it shows a snapshot of the video. I've disabled and enabled adblocker. When I right click on the video and it asks for "player" it shows the video is HTML5. I've tried several HTML5 plug-ins but none of them work. Running Windows 10, Firefox 48.0.2

Since this latest update to 48.0.2, I have lost the ability to view videos on YouTube, Fox News and other news sites. YouTube gives me a snowy screen indicating "Your browser does not currently recognize any of the video formats available". Fox News gives me a black screen indicating I need a plugin, but does let me know the identity of the plugin. Searching the Add-ons site with a word search, I get so many choices, but non address what I need. Have installed the YouTube flash player and YouTube High Definition. Still unable to play the videos. When looking in the Add-ons/Plugins section and click on the link to check and see if my plugins are up to date, the "Keep your Firefox healthy..." page, indicates no plugins were found. I am running Window 10 Pro x64, with the Anniversary update, keeping up with Windows update. Do not want to have to use Edge or IE.

Trying to play a video on Amazon, I get the following message:

Microsoft Silverlight is not installed Install the free Silverlight plug-in; it will just take a minute. Please refresh this page when the installation completes. If you have issues after installing, restart your browser and try again. If the issue persists, try using our new HTML5 video player on Chrome, Internet Explorer 11 on Windows 8.1 or later, Microsoft Edge or Opera.

If I'm reading this correctly, Amazon can play videos natively in the latest versions of Chrome, IE, Edge, or Opera, but requires an extra plug-in (Silverlight) to work in Firefox. Is that right? Is there something wrong with FF? Or something wrong with Amazon?

If it makes a difference, I'm running FF 53.0.3. And the video played just fine once I installed Silverlight.

We are unable to watch any YouTube videos with Firefox. I've added and removed Flash plugins, added and removed HTML5 (several different plugins for it), deleted all history and cookies, started in safe mode, uninstalled and reinstalled, and basically did every other troubleshooting issue I could (aside from DNS because we use corporate DNS). We are unable to show training videos and other work related videos in a corporate environment. We either get the message 'an error has occurred' or 'no video with supported format and MIME type found'. When you first load up YouTube, the featured video at the top of the page comes up as 'secure connection failed'. You can't load the site at all without https, so that wasn't an option to try. Our Flash is updated to the most recent version, so there shouldn't be a security issue there. YouTube is allowed through our firewall. Any help would be appreciated.

The Error message "Firefox has stopped working" pops up 5 times as soon as a youtube starts in the background. After i clicked on "ok" the error message disappeares and the video starts playing. sometimes it even happens when the video starts in the foreground. But then only 1 time. I reinstalled firefox. Deleted all Mozilla folders, no add-ons, i deactived the flash protected mode, i updated my Graficcard driver. No Crashreport available.

Video on Youtube is so slow when it start to play on Firefox. It seems like Firefox process or convert video on Youtube. Firefox take about 5-10 seconds and then Youtbe video is played smoothly unlike the previous version of Firefox that video is not played but both of those 2 issue are bad at the same level

Anytime I play video in Firefox (YouTube, Facebook, other embedded videos) my MacBook Pro heats up rapidly. In general, the computer runs at least 20 degrees hotter when running the video in Firefox as compared to Safari.

So I was going about my daily buisness i was watching some videos on YouTube and quickly had to run some errands, leaving my computer as it was. When I came back Firefox had crashed and would not open regrardless of what I did, so i went and restarted my computer and everything worked except HTML5 videos (facebook's fine cause they use their own thing). The one thing that keeps ringing in my head would be to uninstall and reinstall, any advice would be appreciated

Im building a new webpage with video background. The problem is that Firefox is the only browser that have problem with html5 autoplaying. If page was loaded atleast one time the video is working correclty, starts right after the page load automatically but.. if page is loaded for the first time in most cases the video in background doesn't start and show something like TV's snow.

Facts: - I don't think its code issue, atleast not 'video' tag (tried many configurations thinking it might ), - I'm also sure its not problem with video - tried few videos, - tried all formats - it happens with all of them: mp4, wemb, ogg, All at the same time and individually, - it's not problem with my PC - been trying on windows, mac and linux, - Its not plugin - i don't use any with FF.

Check it out here: http://strona5.nanit.webd.pl Just do it in private session and close window after every load so you'll see that its lottery.

Regards.

please help, my husbands mozilla keeps crashing constantly on youtube and it wont give us a reason as to why. ive already had him check and make sure his sutem was up to date, as well as check the crash reports but there arent any!? im so confused right now and the window that firefox keeps popping up crashing any youtube video is firefox has stopped working, any suggestions? oh, and also ive had him dissable all plug in’s and extentions then activate them all one by one to just see if any of them where the issue, no luck.. thank u, -Sprinkles<3

Hi,

For some youtube videos, firefox will not start loading at some time position.

For instance, this one : https://www.youtube.com/watch?v=iT4PCifOv6Y

If you place at 0:50 for instance, it will never load. But it loads at other positions, like 1:50.

I also reinstalled firefox completely, and I have this problem at my job computer too (2 windows 10)

I don't have this problem in chrome.

Any solution ? Is this a firefox bug ?

Thanks,

Patrick

Hello to all, I have a Windows 10 computer and 64-bit Nvidia graphics card GTX 970, with operating system, drivers and firefox all updated. No plugins and add-ons. I have a problem with flash player video with Firefox (no problem with other browsers) classical screen "is a crash occurred in the Adobe Flash plugin" appears.

Several forum say try to remove hardware acceleration. In Firefox options I tried to uncheck the hardware acceleration, but then when I check on Flash Player window settings, hardware acceleration check box is always enabled and if I click to remove the tick is not selectable.

I also tried it in about: config setting true: gfx.direct2d.disabled layers.acceleration.disabled and then re-initialize the plugins database, reinstalling Flash, but the hardware acceleration check box is always enabled, no chance 'to deselect.

Important: If I uninstall Flash, the video works.

There 's a way to use flash?

Thank you.

A. Veneziano

So everytime I'm wathcing a video in youtube it works great, but as soon as I click full screen, the audio continues, but the video (screen) stays black for like 10 -15 seconds and then it continues playing. The same happens when I go back to regular non full screen

Specific you tube music live stream. Link: https://www.youtube.com/watch?v=hHW1oY26kxQ

This live stream crashes in FF always. Other similar types of live streams work just fine. This specific live stream works just fine in all other browsers. I have tested with add ons, without add ons, on windows, on Mac and they all crash on this specif live stream.

At this point I have no idea how to further try and resolve this besides use Chrome.