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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-… (xem thêm)

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?

Đã được hỏi bởi WoodyFF 11 tháng trước

Đã được trả lời bởi WoodyFF 11 tháng trước

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Amazon password not accepted in Firefox browser

I have used Chrome as my default browser until a Microsoft up date which would not connect Chrome from the desktop. At that time I made Firefox my default browser. FF wi… (xem thêm)

I have used Chrome as my default browser until a Microsoft up date which would not connect Chrome from the desktop. At that time I made Firefox my default browser. FF will not accept my Amazon password. The option it gives me is to change the password. I do not want to change the password as it works fine on Chrome and also Edge. What can I do so that FF will accept my password?

Đã được hỏi bởi octoberbabye 11 tháng trước

Đã được trả lời bởi jonzn4SUSE 11 tháng trước

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Firefox has blocked a specfic url. This is one website. I have no extentions, add-ons or installed blockers

I need a remedy. This is a site I frequently have accessed in the past, but now access with Chrome or Bing. I have re-installed the most recent Firefox version. I have no… (xem thêm)

I need a remedy. This is a site I frequently have accessed in the past, but now access with Chrome or Bing. I have re-installed the most recent Firefox version. I have no plugins, extensions or add-ons installed. Firefox will simply not go the this site. For no apparent reason.

Đã được hỏi bởi wjhanna 11 tháng trước

Đã được trả lời bởi jonzn4SUSE 11 tháng trước

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Firefox wrong on blocking Deceptive site ahead

Looks like Firefox uses Google to decide which sites to block when using FF. I know how to turn it off and get around the block, but FF seems to be following the thinkin… (xem thêm)

Looks like Firefox uses Google to decide which sites to block when using FF. I know how to turn it off and get around the block, but FF seems to be following the thinking of now allowing conservative Christian views on their browser by using Google. This may backfire and is not an open use of the internet as FF claims. The site being blocked is https://www.toddstarnes.com/.

You may not agree with him, but that doesn't mean blocking the site.

Đã được hỏi bởi Jer 11 tháng trước

Đã được trả lời bởi Wesley Branton 11 tháng trước

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Side bar not loadin on Youtube.

It's been quite some time. The menu sidebar on YT is not loading. If I click on a "burger" menu button, it just opens blank sidebar. Also, thematic shortcuts on YT don't … (xem thêm)

It's been quite some time. The menu sidebar on YT is not loading. If I click on a "burger" menu button, it just opens blank sidebar. Also, thematic shortcuts on YT don't work either. The screen just greys out and nothing happens.

Đã được hỏi bởi lowyaw 11 tháng trước

Đã được trả lời bởi FredMcD 11 tháng trước

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Page not displayed the same way either with Edge or with Firefox

Hi, (my PC : Windows 10 with Firefox 84.0.1 (64 bits)) Bug with the french "boulanger.com" website. The same page is not displayed the same way either with Edge or with… (xem thêm)

Hi, (my PC : Windows 10 with Firefox 84.0.1 (64 bits)) Bug with the french "boulanger.com" website. The same page is not displayed the same way either with Edge or with Firefox. One element is missing in the "Mon compte" page. Please, see the two attached image files. Thank you for your anwswer. Richard Kaiser

Đã được hỏi bởi richard.kaiser 11 tháng trước

Đã được trả lời bởi FredMcD 11 tháng trước

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gmail won't load in firefox

I had to reinstall firefox and now I can't load gmail it goes to this page https://support.google.com/accounts/answer/32050?hl=en … (xem thêm)

I had to reinstall firefox and now I can't load gmail it goes to this page

https://support.google.com/accounts/answer/32050?hl=en

Đã được hỏi bởi RC deWinter 11 tháng trước

Đã được trả lời bởi FredMcD 11 tháng trước

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Subs in video of floating window

I use many times youtube and moreI use the feature of floating window(allowing me to see the video on the corner of my PC) but this feature, when I have the option to tra… (xem thêm)

I use many times youtube and moreI use the feature of floating window(allowing me to see the video on the corner of my PC) but this feature, when I have the option to translate(C), it doesn't apear on the video floating. That is my problem if you could fix/ enhance this feature. Many thanks, good work, Francisco Caldeira

Đã được hỏi bởi franciscocaldeira1 11 tháng trước

Đã được trả lời bởi cor-el 11 tháng trước

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Webmail won't load on firefox

Hi There My webmail will not load of Firefox. I haven't been ab;e to access my email via Firefox for over a week. I have spoken to my webmail provider and they say it's a… (xem thêm)

Hi There

My webmail will not load of Firefox. I haven't been ab;e to access my email via Firefox for over a week. I have spoken to my webmail provider and they say it's a problem with Firefox because I can access my webmail on other browsers.

I just want to be able to access my webmail through Firefox like I use to last week. I prefer Firefox's features to other browsers.

No onw seems to be able to help me.

Thanks Carolyn

Đã được hỏi bởi carolyn_jay 12 tháng trước

Đã được trả lời bởi carolyn_jay 11 tháng trước

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automatic signout

websites like whatsapp youtube etc require sign in again and again even after i sign in , when i sign in and close firefox then open the same website again i need to agai… (xem thêm)

websites like whatsapp youtube etc require sign in again and again even after i sign in , when i sign in and close firefox then open the same website again i need to again sign in to that website please help me how to fix it , also my firefox crashed one day , i recently unchecked pop ups then checked them again.

Đã được hỏi bởi gulshersingh150 11 tháng trước

Đã được trả lời bởi cor-el 11 tháng trước

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Web Page Display Error

When using Music Library from my amazon.com account, the web page does not display the index menu on the left side of the screen. It works fine in Microsoft Edge on Windo… (xem thêm)

When using Music Library from my amazon.com account, the web page does not display the index menu on the left side of the screen. It works fine in Microsoft Edge on Windows 10. Can anyone help me with this? I don't want to get rid of Firefox.

Đã được hỏi bởi raustin8 11 tháng trước

Đã được trả lời bởi raustin8 11 tháng trước

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Spell check not working on some websites and some new features on Facebook

My Veterans Group recently moved their Ning website from a Ning2.0 website to a Ning3.0 website. On the old website the browser spell check worked fine on all text boxes.… (xem thêm)

My Veterans Group recently moved their Ning website from a Ning2.0 website to a Ning3.0 website. On the old website the browser spell check worked fine on all text boxes. On the new site it only works in a few text boxes, in most it doesn’t work (the right click menu doesn’t even show a spell check option in those text boxes). I also noticed the same issue on the Ning creators website (which I believe is a Ning3.0 based site).

Also spell check is not available in the new facebook share pop up window’s text box.

Is this something that needs updated I the browser?

Đã được hỏi bởi Big Steve 11 tháng trước

Đã được trả lời bởi cor-el 11 tháng trước

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How do I disable rich audio presence that Firefox now does with Windows 10?

Honestly, I have no idea how to describe it. I loved how when I played a video on Firefox, it wouldn't pop up with that annoying video title whenever I changed my volume.… (xem thêm)

Honestly, I have no idea how to describe it. I loved how when I played a video on Firefox, it wouldn't pop up with that annoying video title whenever I changed my volume. Now, when I'm watching a video or playing audio, this happens. And, it doesn't even get it right most of the time! Like for example, it does this instead! That's not even the page I'm on!

Is there any way for me to get rid of this? Thanks

Đã được hỏi bởi sheepy404 1 năm trước

Đã được trả lời bởi jscher2000 1 năm trước

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How to display in a Japanese font

I downloaded and installed the latest version of Firefox into the new Mac mini (Apple Silicon) arrived at home today, but Japanese sentences in every website are displaye… (xem thêm)

I downloaded and installed the latest version of Firefox into the new Mac mini (Apple Silicon) arrived at home today, but Japanese sentences in every website are displayed not in a Japanese font (like Hiragino) but in a Chinese font.

What should I do so that I make the sentences display in a Japanese font correctly? I tried to change the font settings of the Firefox, but the settings get back to the default font instantly. Please answer me if you know how to solve this problem.

(I'm sorry if my English above is poor or incorrect.)

Đã được hỏi bởi アズ 11 tháng trước

Đã được trả lời bởi アズ 11 tháng trước

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How to disable that mouse thumb buttons trigger "previous page" and "next page" in Firefox?

I really want to disable that Firefox uses the mouse thumb buttons 4 and 5 as "previous page" and "next page" commands. Example: Sometimes I study/play for hours a chess … (xem thêm)

I really want to disable that Firefox uses the mouse thumb buttons 4 and 5 as "previous page" and "next page" commands.

Example: Sometimes I study/play for hours a chess problem on https://tactics.chessbase.com/de/Solve but as soon the page gets reloaded it will be a new chess problem - no way to go back!

Somebody wrote a solution to disable the backspace key (on keyboard) triggering the "previous page" command, assuming the mouse thumb button 4 would be used by Firefox as backspace key. Unfortunately this assumption proofed to be wrong. The solution only disabled the backspace key to trigger the "previous page" command, but the mouse thumb buttons STILL DO TRIGGER the "previous page" and "next page" commands.

Where can I disable the mouse thumb buttons in Firefox - without disable the thumb buttons entirely in the Logitec software?

Đã được hỏi bởi Mark 11 tháng trước

Đã được trả lời bởi cor-el 11 tháng trước

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blocked websites

403 Forbidden is coming up when I am trying to go to my own website. What can I do to stop this? I prefer to use Moz://a, but I need to be able to get to the sites I nee… (xem thêm)

403 Forbidden is coming up when I am trying to go to my own website. What can I do to stop this? I prefer to use Moz://a, but I need to be able to get to the sites I need.

Đã được hỏi bởi rss.home.staging 11 tháng trước

Đã được trả lời bởi jscher2000 11 tháng trước

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Pages not loading correctly with 84.0.1

I'm on a Mac and Firefox is my primary browser. I recently updated to Big Sur, and Firefox updated to 84.0.1 a few days later. At first, things were fine, but something … (xem thêm)

I'm on a Mac and Firefox is my primary browser. I recently updated to Big Sur, and Firefox updated to 84.0.1 a few days later.

At first, things were fine, but something must've updated in the background because now when I go to certain websites or open certain emails, the text becomes scrambled (see attached). I've been trying to read up on what this could be and it sounds like it's possibly a javascript error. I've also read that FF is no longer supporting javascript, so my question is this: How am I supposed to access these sites and read these emails now?

I know I can use another browser and will have to until I can fix this since some of those emails are work-related, but this seems like a major flaw for something that's still widely used on sites. Is there something I'm missing? Do I need to install a plugin or something to convert/translate the code?

I've made sure that javascript is enabled through the about.config steps, but I'm not super computer-savvy and didn't want to risk bricking my machine. If anyone has any suggestions about steps I can try to resolve this, I appreciate any help you can give.

Đã được hỏi bởi jay.katharine 11 tháng trước

Đã được trả lời bởi jay.katharine 11 tháng trước