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Cannot play video

I use firefox 83.0 on Ubuntu 20.04. Browser does not play videos on Twitter, Reddit or Netflix. Youtube plays some videos but some videos show error "your browser does no… (閱讀更多)

I use firefox 83.0 on Ubuntu 20.04. Browser does not play videos on Twitter, Reddit or Netflix. Youtube plays some videos but some videos show error "your browser does not currently recognize any of the video formats available". I cannot find any viable solution. what should I do?

I installed chrome and it plays all the videos. So there must not be any problem in OS.

anchitxp 於 12 個月前 詢問

jscher2000 於 12 個月前 解答

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Importing Logins/Passwords

I have a Linux system with Firefox 83.0 installed. I also have a CSV file of logins from an earlier Firefox. How can I import or use this CSV file to move over my login… (閱讀更多)

I have a Linux system with Firefox 83.0 installed. I also have a CSV file of logins from an earlier Firefox. How can I import or use this CSV file to move over my logins/passwords. I wish not to use Sync because it is someone else's machine. Robert

robweir@telus.net 於 12 個月前 詢問

TyDraniu 於 12 個月前 解答

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Hmm. We’re having trouble finding that site.

I am facing the problem to open the sites. When I used the network, it show the following error: Hmm. We’re having trouble finding that site. We can’t connect to the serv… (閱讀更多)

I am facing the problem to open the sites. When I used the network, it show the following error:

Hmm. We’re having trouble finding that site.

We can’t connect to the server at www.google.com.

If that address is correct, here are three other things you can try:

   Try again later.
   Check your network connection.
   If you are connected but behind a firewall, check that Firefox has permission to access the Web.

Please let me know your suggestion and comments.

mchahalrock 於 1 年前 詢問

FredMcD 於 1 年前 解答

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89.0b2 Revert new tab design

Today I updated my Firefox Developer Edition to version 89.0b2 and now I just can not look at this browser anymore, "Inspired new tab design" is taking too much space and… (閱讀更多)

Today I updated my Firefox Developer Edition to version 89.0b2 and now I just can not look at this browser anymore, "Inspired new tab design" is taking too much space and now became largest and at the same time least information-dense panel in my entire desktop! I searched around the web for a bit in hopes that I will find a theme or an add-on that will revert this particular change but no luck. I really want to revert to old UI look (at least tabs bar), there should be default theme or option to get back to old style. After some investigation I found userChrome.css but don't really want to install it (maybe this is actually the way of doing this kind of styling). Please help me revert UI design to old one.

PepeTheFrog21 於 7 個月前 詢問

TNorth 於 7 個月前 解答

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How do I stop Firefox from opening links in a new window?

Currently, I'm using Firefox 82.0.2 on Fedora 31. Recently, it's started opening most, but not all links in a new window instead of the current one. Not on all sites, b… (閱讀更多)

Currently, I'm using Firefox 82.0.2 on Fedora 31. Recently, it's started opening most, but not all links in a new window instead of the current one. Not on all sites, but most. As a pair of examples, it opens links to articles on gasbuddy.com in a new window but not on Slashdot, and until a few months ago, it only opened a new window if I right-clicked and selected New Window from the context menu. I'd like to get the old behavior back, as this is quite inconvenient.

sideburns 於 10 個月前 詢問

jscher2000 於 10 個月前 解答

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Hide tab bar when only one tab open.

Hello, I am looking for a way to hide my tab bar when there is only one tab open. I almost found the solution there: https://support.mozilla.org/en-US/questions/1297983 B… (閱讀更多)

Hello,

I am looking for a way to hide my tab bar when there is only one tab open. I almost found the solution there: https://support.mozilla.org/en-US/questions/1297983 But it is not exactly what i am looking for. This solution hides the tab but not the tab bar it self. I mean it leaves some black empty space because i use dark theme.

I kept looking for a solution to hide the container. I found this one: https://support.mozilla.org/en-US/questions/1271391 The problem is: this solution hides all the time the tab bar. No maters how many tabs opened.

I experimented mixing these two solution. I have try:

  1. tabbrowser-tabs tab[first-visible-tab="true"][last-visible-tab="true"] + #mainwindow:not([tabsintitlebar="true"]) #TabsToolbar {
 visibility: collapse;

}

I tried the other way around, with "#mainwindow" first. I tried without the "+" sign. But none worked out.

Gregory-F 於 9 個月前 詢問

jscher2000 於 9 個月前 解答

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How can I make DuckDuckGo my default search engine?

I have searched & searched and read & read and have not found Joy. I followed the Firefox DDG install instructions at duckduckgo.com (which succeeded and now that… (閱讀更多)

I have searched & searched and read & read and have not found Joy.

I followed the Firefox DDG install instructions at duckduckgo.com (which succeeded and now that it's succeeded can't be duplicated), and here: https://www.linuxmint.com/searchengines/anse.php?sen=DuckDuckGo (which doesn't work), but here: 'Preferences' > 'Search' > 'Default Search Engine' DuckDuckGo doesn't appear in the drop-down list. Help!

Mark Filipak 於 12 個月前 詢問

cor-el 於 12 個月前 解答

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DRM content won't play

After installing the DRM content through the browser I still cannot play any videos on Netflix or Udemy. I have run this website (https://www.jeffersonscher.com/sumo/htm… (閱讀更多)

After installing the DRM content through the browser I still cannot play any videos on Netflix or Udemy.

I have run this website (https://www.jeffersonscher.com/sumo/html5-video.html) from previous answers to check and the results are attached to the question.

I have also checked media.eme.enabled and it is set to true.

I am very much puzzled by this.

Alex 於 10 個月前 詢問

jonzn4SUSE 於 10 個月前 解答

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Firefox throws SEC_ERROR_BAD_SIGNATURE error for a site but Chromium says certificate is valid

Hi all, I have an Apache site on Kubuntu 20.04 with a certificate signed by my private CA. I've added the root CA ceritificate in Firefox and in Chromium. Firefox throws … (閱讀更多)

Hi all, I have an Apache site on Kubuntu 20.04 with a certificate signed by my private CA. I've added the root CA ceritificate in Firefox and in Chromium.

Firefox throws a SEC_ERROR_BAD_SIGNATURE error

Chromium accept the certificate as valid

What can I do?

Notes: the site url is "https://hdev.h.net" (with an internal IP address inside my lab)

Attached there are:

- the authority settings page
- the certification authority certificate as seen by Firefox
- the site certificate

Firefox version 82.0 Ubuntu Chromium version 86.0.4240.11

m.busico 於 1 年前 詢問

cor-el 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 1 年前 詢問

cor-el 於 1 年前 解答

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How do I change the font for my menu and toolbar?

Hello, I am a dyslexic user and I am trying to change the font of my menu to open-dyslexic, however i cant figureout how and most of the answers here only answer for chan… (閱讀更多)

Hello, I am a dyslexic user and I am trying to change the font of my menu to open-dyslexic, however i cant figureout how and most of the answers here only answer for changing the size, but not the actual font for the menu bar. How do I change the font of my tabs, bookmarks, and ect? thank you

Nafeesa 於 7 個月前 詢問

cor-el 於 7 個月前 解答

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WebGL stopped working after the Firefox 88 upgrade

Per the title, webgl suddenly stopped working a couple days ago. The error seems to be: WebGL creation failed: * WebglAllowWindowsNativeGl:false restricts context creatio… (閱讀更多)

Per the title, webgl suddenly stopped working a couple days ago. The error seems to be:

WebGL creation failed: * WebglAllowWindowsNativeGl:false restricts context creation on this system.

I'm on Ubuntu 21.04 (X, not wayland) with an nvidia graphics card. The "share data" below seems comprehensive, but let me know if any other info will help.

john588 於 7 個月前 詢問

cor-el 於 7 個月前 解答

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Cursor goes to address bar instead of search bar

In Ubuntu 18.04, I bring up a new page, click in the search bar in the middle of the page. Then when I start typing it jumps to the address bar although I have already pl… (閱讀更多)

In Ubuntu 18.04, I bring up a new page, click in the search bar in the middle of the page. Then when I start typing it jumps to the address bar although I have already placed and preferred the search bar to the right. No! NO! NO!

I use Duck Duck Go but Google does the same.

It is bad enough that the upgrade was automatically loaded but on top of that, changing preferences including dumping my home page. Change privacy settings without asking ( to a lower level on top of that ).

Really POOR form.

dee3 於 6 個月前 詢問

jscher2000 於 6 個月前 解答

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userChrome.css does not seem to be getting applied.

I was following this reddit thread on how to remove the "your camera and microphone are being shared" popup, but it's having no affect. I have set `toolkit.legacyUserProf… (閱讀更多)

I was following this reddit thread on how to remove the "your camera and microphone are being shared" popup, but it's having no affect.

I have set `toolkit.legacyUserProfileCustomizations.stylesheets` to true.

Here's the full contents of the userChrome.css file: ```

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

#webrtcIndicator {
  display: none;
}

```

SirFireball 於 8 個月前 詢問

cor-el 於 8 個月前 解答

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Full screen mode not working

For past few days browser fails to go into full screen mode properly. Tabs and url input section remain in sight. Screen mode is toggled with F11 or via menu bar, zoom. P… (閱讀更多)

For past few days browser fails to go into full screen mode properly. Tabs and url input section remain in sight. Screen mode is toggled with F11 or via menu bar, zoom. Previously it was working?

ab2qik 於 1 年前 詢問

cor-el 於 1 年前 解答

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Address Bar Search Not Working

Hi, Firefox 84.0.1 (64-bit) on Linux Mint 18.3 I have the 'Use the address bar for search and navigation' option selected in settings but when I enter a search all I get … (閱讀更多)

Hi,

Firefox 84.0.1 (64-bit) on Linux Mint 18.3

I have the 'Use the address bar for search and navigation' option selected in settings but when I enter a search all I get is 'Hmm. That address doesn’t look right. Please check that the URL is correct and try again.'

Any ideas please?

caned_monkey 於 10 個月前 詢問

jscher2000 於 10 個月前 解答

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Firefox does not load any pages or settings or login for firefox account

Hi everyone, Thanks a lot for taking time reading this! :) I have the following problem with my firefox on Kubuntu 20.04 on my laptop: since a couple of weeks, firefox op… (閱讀更多)

Hi everyone,

Thanks a lot for taking time reading this! :)

I have the following problem with my firefox on Kubuntu 20.04 on my laptop: since a couple of weeks, firefox opens normaly after rebooting, remembered all tabs and my firefox account etc., but it's just not loading anything. I can still type in a web adress or something in the search, I can also still select the drop-down menu on the right ("Open menu") and select e.g. "Settings", but nothing happens afterwords. Same problem for all websites. Some of the main buttons are also not functional (refresh, back/forward). I attached a screenshot from the "empty" firefox (but not sure if that's of any help anyways ;) ).

I tested a couple of things so far, nothing helped:

1) Internet is working, I tested ping, apt is working as well as a differnt browser I installed now).

2) I reinstalled firefox completely by running the following commands:

      sudo apt update
      sudo apt purge firefox // sudo apt --purge autoremove firefox
      sudo rm -rf .mozilla
      reboot
      sudo apt update
      sudo apt install firefox
      (Since I removed the profile folder, the standard tab and bookmarks open/show after starting firefox now, as expeced. I'm also not longer logged in.)

3) By starting firefox via the console, no error messages were shown

4) I created a second ubuntu unser profile, to test if firefox would work there: it doesn't

5) Since I have a dualboot with Win10/Kubuntu 20.04, I started Windows and tested firefox there: it is working as usual.

6) I also obviously tried to google this problem, but either I put the wrong keywords in or this problem is pretty unique/new?

If you need any further information on my system, I'm happy to provide them! Thanks a lot for any recommendations and further ideas, what to do! I'm pretty much desperate for a solution by now, as during home office a not well working system is a pain! ;)

Thanks and stay safe, Katrin

Kaddi 於 8 個月前 詢問

TyDraniu 於 8 個月前 解答

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Updated to Firefox 81.0 but credit card autofill is still missing from Options/Preferences menu

I just updated Firefox to version 81.0 in Linux, Windows and Mac, but the credit card autofill option is still missing from the Preferences menu. I followed the instructi… (閱讀更多)

I just updated Firefox to version 81.0 in Linux, Windows and Mac, but the credit card autofill option is still missing from the Preferences menu.

I followed the instructions from here:

https://support.mozilla.org/en-US/kb/credit-card-autofill

Yes, I am located in the US.

Mr.K 於 1 年前 詢問

Mr.K 於 1 年前 解答

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firefox snap 89.0, to play video, you need to install the required video codecs

On ubuntu 20.04, the snap version of firefox can't play some videos. Some youtube videos will play but streams won't, and then I get the message "to play video, you need … (閱讀更多)

On ubuntu 20.04, the snap version of firefox can't play some videos. Some youtube videos will play but streams won't, and then I get the message "to play video, you need to install the required video codecs". On telegram web and tweetdeck I also get this message while trying to play some video.

Since it's a snap, nothing I do on my system will solve the problem, I cannot install any codecs.

It's firefox 89.0

Lucas Zanella 於 5 個月前 詢問

cor-el 於 5 個月前 解答

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Facebook White Screen (only with Firefox)

Today I got what I've seen described as the "Facebook White Screen of Death". I've tried: Reload Clear Facebook cookies (which implies logging back in) Clear site data Re… (閱讀更多)

Today I got what I've seen described as the "Facebook White Screen of Death". I've tried: Reload Clear Facebook cookies (which implies logging back in) Clear site data Restart in Safe Mode None of these things make any difference. Still get only a white screen. Facebook works fine in the Chrome browser and in the Android app, so it must be a Firefox-specific issue, in my case. This is Firefox 81.0.2 under Ubuntu 20.04 The problem only started today. I've used Facebook with Firefox for years without problem.

David Shochat 於 1 年前 詢問

jscher2000 於 1 年前 解答