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Does Firefox support .mp4 video?

On page https://support.mozilla.org/en-US/kb/html5-audio-and-video-firefox?redirectslug=viewing-html5-audio-and-video&redirectlocale=en-US I find "AAC and H.264/MPEG-… (閱讀更多)

On page https://support.mozilla.org/en-US/kb/html5-audio-and-video-firefox?redirectslug=viewing-html5-audio-and-video&redirectlocale=en-US

I find "AAC and H.264/MPEG-4 AVC are patented audio/video compression formats. They can be viewed in Firefox using built-in OS libraries (so neither Mozilla nor you need to pay a fee) if embedded in the MP4 container format (.mp4, .m4a, .m4p, .m4b, .m4r, .m4v file types)."

But when I create an HTML page with the following HTML5 code:

<!DOCTYPE html>
<html>
<body>
</body>
This is a test of video.
<video src="C:/MyVideoFile.mp4" controls>
</video>
</html>

I get the error "No video with supported format and MIME type found". Does Firefox in fact support .mp4 video? If so, what changes do I need to make in the HTML?

WoodyFF 於 1 年前 詢問

WoodyFF 於 1 年前 解答

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Google maps suddenly will not allow Firefox to display maps on website

Suddenly on my Wordpress website all the embedded google maps on posts are showing "maps.google.com will not allow Firefox to display the page if another site has embedde… (閱讀更多)

Suddenly on my Wordpress website all the embedded google maps on posts are showing "maps.google.com will not allow Firefox to display the page if another site has embedded it". They've worked for months. Won't display on Firefox or Firefox Android. I can't even edit the maps in WP (Elementor widget) - shows the same banner.  ?

overwater 於 1 年前 詢問

overwater 於 1 年前 解答

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Firefox 91 Linux - WebGL stopped working

WebGL has stopped working. I think this has happened with Firefox 91. For example, http://webglsamples.org/aquarium/aquarium.html gives the error Status: WebGL creation f… (閱讀更多)

WebGL has stopped working. I think this has happened with Firefox 91.

For example, http://webglsamples.org/aquarium/aquarium.html gives the error Status: WebGL creation failed: * tryNativeGL () * Exhausted GL driver options. (FEATURE_FAILURE_WEBGL_EXHAUSTED_DRIVERS)

I'm running Firefox on Debian on ChromeOS.

On about:support, WebGL 1 Driver Renderer: Red Hat -- virgl WebGL 2 Driver Rendered: Red Hat -- virgl

There are no WebGL errors in about:support

I've tried the Troubleshoot Mode but that made no difference.

Rob 於 1 年前 詢問

Rob 於 1 年前 解答

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Website will not allow Firefox to display the page if another site has embedded it

I have a new business website http://affordable-tutors.com/about-our-tutors and I tried to put in my video https://youtu.be/EQxd_cowXPg but it gives me the following erro… (閱讀更多)

I have a new business website http://affordable-tutors.com/about-our-tutors and I tried to put in my video https://youtu.be/EQxd_cowXPg

but it gives me the following error. Website will not allow Firefox to display the page if another site has embedded it

What can I do?

Yes, I own all the rights for that video.

Markis 於 1 年前 詢問

Markis 於 1 年前 解答

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Youtube CORS error

Hi, I faced the problem with Youtube recommendations on a video page. When I watch a video I can't see recommendations, comments and video title (see the image). In conso… (閱讀更多)

Hi, I faced the problem with Youtube recommendations on a video page. When I watch a video I can't see recommendations, comments and video title (see the image). In console i get an error: Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://googleads.g.doubleclick.net/pagead/id. (Reason: CORS request did not succeed).

I am on arch linux system.

I've tried to: 1. Update all ca-certificate* packages 2. Disable and delete ad-block 3. Use another browser (there is no problem, only in firefox)

This problem is only actual on Youtube for me.

Yuudai 於 2 年前 詢問

cor-el 於 2 年前 解答

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FACEBOOK - Typing a comment causes the screen to scroll on its own.

Starting as of today (Oct 13), the FACEBOOK screen suddenly moves when I am typing a comment. Whenever I hit SHIFT+alpha_letter at the beginning of a line OR simply hit t… (閱讀更多)

Starting as of today (Oct 13), the FACEBOOK screen suddenly moves when I am typing a comment. Whenever I hit SHIFT+alpha_letter at the beginning of a line OR simply hit the backspace key, the screen suddenly shifts about a page up, closer to top. This shifts the entry area where I'm typing down and off the screen. Just hitting the backspace to correct a typo causes the screen to scroll on its own. I have to scroll back down to the entry box and if I make another typo, it happens again. It is maddening!

I've restarted in troubleshoot mode and the same thing happens, so it is not an add-on. This is happening on both my Firefox Linux systems AND on a Windows 10 machine, so I don't think it is specifically OS related either. The screen however does stay put, like it is supposed to, using Chrome or Opera.

Is this a Firefox problem or is FACEBOOK messing with Firefox?

nosoy1 於 1 年前 詢問

nosoy1 於 1 年前 解答

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Youtube keeps "pausing" the video im playing

Sometimes when watching youtube the video will be paused, once I unpause it it immediately pauses it again, I dont know when and why this happens but it happens. Only ext… (閱讀更多)

Sometimes when watching youtube the video will be paused, once I unpause it it immediately pauses it again, I dont know when and why this happens but it happens. Only extensions are honey, ecosia search and stylus

atiedebee 於 1 年前 詢問

jscher2000 - Support Volunteer 於 1 年前 解答

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How to block automatic loading and opening pdf files in browser

It seems like something has changed recently, I don't remember having such problem before. As you can see on one of my pictures I have browser settings changed to always … (閱讀更多)

It seems like something has changed recently, I don't remember having such problem before. As you can see on one of my pictures I have browser settings changed to always ask what to do with every file extension, yet encountering link to pdf file it loaded automaticly in special frame instead of showing just link to it. I included pictures of this frame, settings and another screenshot of the same website in Opera browser with similar settings where nothing loads itself.

Link to the problematic comment with auto-loading pdf: https://kodluch.wordpress.com/2021/09/30/30-09-2021-syria-2187-dzien-sprzatania-swiata/#comment-115906

Is there any way to block such pdf-frames in current version of Firefox?

Martin

nabaC 於 1 年前 詢問

Terry 於 1 年前 解答

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Error: Access Denied. You don't have permission to access

I can't access https://www.barnesandnoble.com/ without getting the following error message: Access Denied. You don't have permission to access "http://www.barnesandnoble.… (閱讀更多)

I can't access https://www.barnesandnoble.com/ without getting the following error message:

Access Denied. You don't have permission to access "http://www.barnesandnoble.com/" on this server.

I've tried to clear the history/cache and also turned off vpn.

It just happened, it was working a few moments ago.

Any help is much appreciated!

Jojo

joken674 於 1 年前 詢問

cor-el 於 1 年前 解答

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Firefox unusable on eBay!

I've used Firefox forever, however in the last couple weeks, I can no longer use eBay as the webiste looks weird and my account is inaccessible. (See attachment.) I've… (閱讀更多)

I've used Firefox forever, however in the last couple weeks, I can no longer use eBay as the webiste looks weird and my account is inaccessible. (See attachment.)

I've cleared all history/caches/etc. per forum suggestions. No change. So now to use eBay, I have to switch to Safari or Chrome (which I rarely use.)

Using new 2020 Macbook Pro and latest Firefox 80.0 update. Any suggestions would be greatly appreciated!

-G

TheGMan 於 2 年前 詢問

Wesley Branton 於 2 年前 解答

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PR_END_OF_FILE_ERROR

Fire fox updated t his morning now half my web sites I used yesterday come up with this PR_END_OF_FILE_ERROR, bing , yahoo, usps and faacebook just to name a few!!!!!! No… (閱讀更多)

Fire fox updated t his morning now half my web sites I used yesterday come up with this PR_END_OF_FILE_ERROR, bing , yahoo, usps and faacebook just to name a few!!!!!! Not Happy!!!

randwolf64 於 10 個月前 詢問

jscher2000 - Support Volunteer 於 10 個月前 解答

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ESPN.com website keeps redirecting to it's foreign sites

Hello, I have the site espn.com bookmarked and for the last month or so it has been opening it's various foreign sites instead of the united states version when I click o… (閱讀更多)

Hello,

I have the site espn.com bookmarked and for the last month or so it has been opening it's various foreign sites instead of the united states version when I click on the bookmark tab. It will switch to the UK and Mexico sites randomly when I click on the tab. The address is saved as the US version (espn.com) when this happens so I can't figure out why it's doing it. It doesn't matter if I use a vpn that says I'm in the US or just my regular internet provider in the US, the site keeps changing what country it chooses to open with. I noticed that every time I click the tab it will cycle between the various different sites for each country even though as I said before, the bookmark is set for espn.com. It makes no sense as none of my other bookmarks do this and it doesn't do it when I use Safari's browser. Is there anything on my end I can do to get this to stop or is it coming from espn.com's end? Thank you for your time and help. :)

mtnrydr 於 10 個月前 詢問

FredMcD 於 10 個月前 解答

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Images will not load

I have Firefox 96.0.1. As of this morning, images will no longer load on any websites. The only thing that has changed since yesterday is that I followed some advice fr… (閱讀更多)

I have Firefox 96.0.1. As of this morning, images will no longer load on any websites. The only thing that has changed since yesterday is that I followed some advice from the Washington Post on how to prevent scam emails. I have spent nearly two hours searching for and following advice to restore images on Firefox, but nothing has worked. I need more direct assistance!

womanfield 於 10 個月前 詢問

cor-el 於 10 個月前 解答

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Firefox no longer works with Amazon Prime video

Firefox was just updated to version 91.0.2 (64 bit), and now the l;inks on Amazon Prime video no longer work. Many of the links take me to my Watchlist. I tried accessing… (閱讀更多)

Firefox was just updated to version 91.0.2 (64 bit), and now the l;inks on Amazon Prime video no longer work. Many of the links take me to my Watchlist. I tried accessing the site using Chrome and Edge - no problems with those browsers. Firefox was working with Amazon last night, so this is something that happened with the recent update.

darweb2 於 1 年前 詢問

darweb2 於 1 年前 解答

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SaveFrom.net Helper

The other day I downloaded SaveFrom.net Helper but then shortly after I deleted it. The program was deleted from the computer except that the green line with the program … (閱讀更多)

The other day I downloaded SaveFrom.net Helper but then shortly after I deleted it. The program was deleted from the computer except that the green line with the program name shows as an extension on the bar at the top of the Firefox page.

I cannot delete it. If I delete it once it reappears next time I load Firefox. The extension does not show up in add ons and extensions in Tools Firefox.

I have read an earlier reply that suggests delete Firefox and reinstall Firefox and that will get rid of it.

However, I am not anxious to try that as over time I have already extensions ad add ons and other customisation of Firefox, including all my bookmarks and I don't want to lose these and start again.

So here is my question. As the program is deleted and as their extension does not show up in Tools and then adddons, can I assume that the existence of the program name as an extension on one of the title bars at the top of Firefox is just an irritation and that this SaveFrom program cannot in any way add or do anything to my computer?

I can then live with it rather than deleting Firefox and starting again.

I would be so grateful for your help.

Thank you.

avwood 於 1 年前 詢問

jscher2000 - Support Volunteer 於 1 年前 解答

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Can't login to Spectrum.net using Firefox

Spectrum.net has changed their login page as of March 17, 2021. I am unable to login under Firefox and get Spectrum error 'IDID-1060'. I tried Edge and Chrome browsers … (閱讀更多)

Spectrum.net has changed their login page as of March 17, 2021. I am unable to login under Firefox and get Spectrum error 'IDID-1060'. I tried Edge and Chrome browsers with no problems. I contacted Spectrum and they say it's a Firefox issue. I've tried removing extensions, clearing caches, starting in Firefox 'safe mode', disable VPN but nothing works! I would prefer NOT to reset Firefox as I don't want to lose my changes. I'm on version Firefox 86.0.1 and Windows 10 20H2. Does anyone else have this problem or can suggest other troubleshooting ideas?

baumkd 於 1 年前 詢問

·´¯`·...¸>-)))º> ~dbben 於 1 年前 解答

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SEC_ERROR_UNKNOWN_ISSUER for Google and Youtube

I am getting a certification issue when trying to visit 2 specific sites which are some of the most visited sites in the web: https://www.google.com and https://www.youtu… (閱讀更多)

I am getting a certification issue when trying to visit 2 specific sites which are some of the most visited sites in the web: https://www.google.com and https://www.youtube.com

The error it shows when trying to visit these 2 pages, is SEC_ERROR_UNKNOWN_ISSUER.

I have tried to troubleshoot it and follow the solutions recommended at: https://support.mozilla.org/en-US/kb/error-codes-secure-websites#w_the-error-occurs-on-multiple-secure-sites

however none of the solutions described in this guide worked to solve my problem.

In that guide, one of the suggested solutions is to scan my system for any malware. I used the following: Windows Defender Maleware Bytes AntiMalware Karpersky TDSSkiller however the results are all clean.

In the guide, it suggested that I check the clock as well. The system clock however is synchronized.

Last, I have resetted Firefox Profile but this didnt fix the issue either.

I shall note that the issue appeared yesterday and so far nothing helped fixing it. Not even the system restarts.

The issue about visiting these two sites, is limited only to Firefox.

I can access https://www.google.com and https://www.youtube.com without problems using Google Chrome and the Opera Browser.

Also, Google Mail and Google Translate work fine on Firefox. These two sites can be accessed with Firefox without causing any SEC_ERROR_UNKNOWN_ISSUER errors.

SilentResident 於 2 年前 詢問

philipp 於 2 年前 解答

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vanguard login quit working

been using ff to login to vg for a couple years. ~2 weeks ago it quit working-i click login & nothing happens, the login page remains unchanged. login works with chro… (閱讀更多)

been using ff to login to vg for a couple years. ~2 weeks ago it quit working-i click login & nothing happens, the login page remains unchanged. login works with chrome & opera no problem.

dblazen84 於 1 年前 詢問

cor-el 於 1 年前 解答

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Firefox blocks FedEx tracking

Hello, I have had a few websites not work properly with Firefox and have needed to open my backup browser (Avast Secure Browser) to use those websites. Right now it is Fe… (閱讀更多)

Hello,

I have had a few websites not work properly with Firefox and have needed to open my backup browser (Avast Secure Browser) to use those websites.

Right now it is FedEx that comes to mind again as I kept checking for tracking of packages shipped to me since receiving the tracking info. I queries consistently returned the error message "Unfortunately we are unable to retrieve your tracking results at this time. Please try again later."

Thinking maybe the website was having issues or maintenance (and forgetting I had the same issue with FedEx website the last time I tried tracking there in Firefox), I kept "trying again later".

Then I opened my Avast browser and pasted the same url there and, sure enough, received this report on the display:

Travel History Date or Time City & State Status Monday, April 18, 2022 9:47 PM SPARROWS POINT, MD Departed FedEx location Sunday, April 17, 2022 1:49 PM Shipment information sent to FedEx

I have tried disabling the extension NoScript as well as turning off the "Enhanced tracking protection" and allowing permissions for the FedEx site with no improvement.

I copied and pasted the RAW data as well as the text version from the "about:support" page to send you.

Any suggestions to fix this?

Thank you, Keith McNabb

kemcnabb 於 7 個月前 詢問

kemcnabb 於 7 個月前 解答