Firefox 技術支援討論區

Earlier today I tried to full screen youtube and It wouldn't work. I saw some suggestions on here saying delete cookies so I did and now it full screens, however the video is partway down the screen and above it is an empty white box. I've tried restarting in safe mode and deleting cookies again and neither of those worked. i'm having no issues in other browsers so I have no idea what could be causing it.

Can't play videos on Netflix. Keep getting the same error. Playback error Code: F7701-1003.

Firefox 67 32 bits linux OS. Widevine 4.10.1196.0 OpenH264 video codec 1.7.1

I just started to use Firefox and am having a problem seeing the video for Fox and CNN News. Youtube works great, best picture I've seen. The links work good on Chrome, but, when I play them on Firefox the video seems to have a black box across the screen. I can see a very small top and bottom section, that's all. I have the lastest Firefox, Flash and Shockwave. I have disabled the Adblocker and the Ublock with no change. I've searched the forums and cannot find an answer, or I'm subject blind.

Any ideas

PLEASE HELP BEFORE I GO INSANE. Firefox is great with a youtube video download add-on, recently Firefox was asking me to restart with the latest Firefox version 67.01, My youtube downloader was working fine so I put the Firefox restart off till another day and continued for around a week downloading my favourite drummer vids, all was TickaDeeBoo until I decided to go for the latest Firefox 67.01 restart, now my video downloading days are over. I have worked my way through the list of add-on's only to find none of them do the trick. Every time I choose a downloader add-on I click on MP4 360 as it has the audio too, other options are with no audio, no good to anyone. Once clicked, my download destination appears, I click save to store the video in my downloads, in the top right hand corner next to View History & Saved Bookmarks etc is the downward pointing download confirmation arrow which lights up immediately but sadly shows as 0 MegaBytes. Where as when the add-on was working that same downloading arrow would only light up once it had truely downloaded the chosen video. Its really funny you know because about 2months ago I was using an add-on that would only bring up downloading options (MP3,MP4 etc) if you avoided clicking actually on the word "Download", In other words clicking not on the word but away from the word but still inside the box, how weird is that, but it worked everytime, sadly no more. I am a Drummer who follows the lives of my favourite world class Drummers, its great when an add-on works, sound & vision. But when its not working all I can do is record the audio and make do with that. I have been saving in my youtube play list all the video's I've not been able to download in the hope that some day soon that will all change for the better. I sincerely would be over the moon to have this feature back even if its just for a short while (until it all goes pair shaped again) TO THOSE IN THE COMMUNITY, ANY IDEAS ??? Kind Regards, Jonathan.

ffmpeg is installed

== From twitter web page: error in web console:

For example, on twitter i get a "the media could not be played" placeholder and this in the web console:

HTTP “Content-Type” of “video/mp4” is not supported. Load of media resource https://video.twimg.com/amplify_video/1149302678771683333/vid/1280x720/qFCcMLAnjR_MBans.mp4?tag=13 failed. home

The video on this page can’t be played. Your system may not have the required video codecs for: video/mp4; codecs="avc1.42E01E mp4a.40.2"

When i click on that link in the error it saves the video to /tmp and plays it in ffplay.. and in preferences->Applications, video/mp4 shows up with ffplay configured.

== Plays fine with a local file

When I put that mp4 link in the address bar, it gives me a download dialog, I can download that file, and play it in firefox from the command line:

firefox qFCcMLAnjR_MBans.mp4

== Plays fine with a local html file with the video control html element:

When i open a local html file with the video control element that plays the video. So why do I get those errors when this is viewed on the twitter website?

Any pointers appreciated.

Thanks!

netflix wont play, it goes to a screen that says it wont play due to licensing issues with the player. On Hulu, it says to update firefox, which I did, but same problem. When I use Safari it works perfectly. This started about a week ago.

How to prevent stop and go in videos? I can not watch videos in Firefox due to constant pausing. Videos pause as often as every 10 seconds. Also on Android cell phone. Also, out of focus. Using Ubuntu 18.04. ISP is Hugesnet. Hugesnet says there is no problem with reception.

Any help appreciated. dlw

I have auto update and installation checked. I have very few sites where ABP allows ads. I have Bitdefender for antivirus. I have reset Firefox at least 5 times this past 6 weeks. This has gotten old. I have tried starting without the Add-ons, but what's the sense of having Add-ons available then? If I try to use Firefox with the autoplay feature for videos on sites like NFL.com or NASCAR.com, Firefox will in short time crash (Firefox is not responding), ..usually when I have more than 2 tabs open, but has done it with a singular tab open. As a matter of fact, it will sometimes crash before loading the page. If I use FIrefox with autoplay disabled, I can't even prompt the video to play. It doesn't even show up in the play section when prompted. So what's the sense of that? After resetting Firefox, I fail to understand why in the most viewed panel, why my most viewed aren't there after each reset? Also, why doesn't it populate my most viewed consistently? That being, if I go to the same sites all the time, why don't they show as most viewed? I get sites showing up I've only been to once in a month, instead of multiple times in a day. My final thing...why does Edge keep prompting me to install it while using Firefox? I have Edge already installed when Firefox crashes and it has a fresh install from just 2 weeks ago. But I still get these annoying notifications. I know this is long, but this is what happens when you try diligently to do as the instructions show in the Help section multiple times...only to come to the same conclusion. Can someone please help?