Showing questions tagged: اعرض كل الأسئلة
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How to identify what plugin is required?

When one browses to a website, and it fails to load with the little grey label that says "A plugin is required to play this content", how on earth does one identify WHICH… (read more)

When one browses to a website, and it fails to load with the little grey label that says "A plugin is required to play this content", how on earth does one identify WHICH plugin?

I have been using firefox for years and have a system that work perfectly most of the time, and has all the usual suspects already installed. But when I see the message above, I just get frustrated because there is no link to follow, and so far as I can tell, no information at all to lead to a resolution of the issue.

Thanks for any pointers.

Asked by gth65 6 years ago

Answered by philipp 6 years ago

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Unable to launch Firefox 46 in RHEL 6.6

After updating to Firefox 46.0 in RHEL 6.6, when I launch I get the following error: XPCOMGlueLoad error for file /usr/local/firefox/libmozgtk.so: libgtk-3.so.0: cannot o… (read more)

After updating to Firefox 46.0 in RHEL 6.6, when I launch I get the following error: XPCOMGlueLoad error for file /usr/local/firefox/libmozgtk.so: libgtk-3.so.0: cannot open shared object file: No such file or directory Couldn't load XPCOM. I tried to install any package gtk3 or similar, but only find gtk2 and gtk+ are available in Red Hat, and I have already installed. I downgraded to 45.0.2 that works fine. Thanks.

Asked by pedrorito 5 years ago

Answered by James 5 years ago

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Unable to play video streams from vimeo, others in Firefox.

Error with Vimeo source: Player error The player is having trouble. We’ll have it back up and running as soon as possible. This video is either unavailable or not support… (read more)

Error with Vimeo source: Player error The player is having trouble. We’ll have it back up and running as soon as possible. This video is either unavailable or not supported in this browser

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Error from finewoodworking.com: Error Code: MEDIA_ERR_SRC_NOT_SUPPORTED Technical details : No compatible source was found for this media. Session ID: 2018-10-04:bc5f8e3bb5df654965dbea25 Player Element ID:myPlayerID

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Running v 60.2.1esr (64-bit) "Mozilla Firefox for Red Hat Enterprise Linux" on Scientific Linux 7.5 (distro from Fermi Labs based on RHEL). All extensions and plugins are disabled (have tried enabled & disabled with same result).

Videos all run great on my Ubuntu 16.04LTS box with Firefox 62.0.3 (64-bit) "Mozilla Firefox for Ubuntu" with the same plugins + "Shockwave Flash (Ask to Activate)."

Frustrating. Anyone have any ideas? TIA Ric

Asked by lucubrator 2 years ago

Answered by James 2 years ago

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Google web fonts not rendered

Pages with web fonts, like http://google.com/fonts, are not rendered correctly. All text that should be web fonts is shown with the default font. This is Firefox 20.0 on … (read more)

Pages with web fonts, like http://google.com/fonts, are not rendered correctly. All text that should be web fonts is shown with the default font. This is Firefox 20.0 on Ubuntu 13.04 with Gnome 3.8. - Starting in safe mode does not help. - neither does starting with a new blank profile. - There are no error messages in the Error Console. - Javascript is enabled. - not allowing hardware acceleration does not help. - the "Allow sites to use their own fonts" option is checked. - I am not behind a proxy.

What else is there to check?

Asked by Skeltzer 8 years ago

Answered by Skeltzer 8 years ago

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Why do some YouTube videos stop playing after a short time?

Since sometime in October, 2013, I have noticed that more and more YouTube videos stop playing within a minute of starting. Most that stop do so in 15 or 16 seconds. Th… (read more)

Since sometime in October, 2013, I have noticed that more and more YouTube videos stop playing within a minute of starting. Most that stop do so in 15 or 16 seconds. The playing stops because the download stops. I watch this on a network activity monitor I always have running. Not all videos do this, but the problem is becoming more and more frequent. Some videos which played correctly for me in the recent past are now exhibiting this problem.

Other than installing the latest Firefox updates I have NOT changed the software on my machine. I run Linux by the way. I do not think this is a Linux problem because (1) it was all working before and (2) my son who runs both Mac OS X *and* Windows is also seeing the same problem. We both use Firefox as our browser on all our platforms.

I should also note that I am NOT seeing this problem with any of the other video websites I use, only when I go to YouTube. That leads me to believe that the problem is not in Firefox; if it were it should affect videos from all websites.

Additionally the problem occurs whether or not I log into YouTube.

I have not run Firefox in safe mode because all the extensions I use did not affect the download of Videos before, so I don't expect unchanged extensions to suddenly start causing problems.

So, anyone else see this problem? (There was another note which talked about the same problem but it was disabled.)

Also -- pardon my paranoia, but -- I need to ask: Since YouTube is owned by Google and Google has its own browser it wants you to use, Chrome, is it possible that Google is intentionally causing some YouTube videos to fail if it sees that they are being sent to Firefox?

(That is not so outlandish I think. Microsoft WAS at one point caught mangling web pages going to certain web browsers other than IE. And these days Google wants to dominate the Internet just as badly as Microsoft does, so why not pull dirty tricks too?)

If this keeps happening I am going to have to try Google's Chrome to see if it somehow manages to play YouTube videos correctly while Firefox does not. But I really do NOT want to install Chrome because I trust Google about as much as I trust Microsoft, which is to say Not At All.

Thanks in advance.

Asked by Jeff Barry 7 years ago

Last reply by leolla 7 years ago

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I get a 403- Forbidden: access is denied message when trying to access my Microsoft Outlook Web App email

I am using Firefox version 33.0 with an Ubuntu 14.04 LTS operating system. I get a 403- Forbidden: access is denied message when trying to access my Microsoft Outlook We… (read more)

I am using Firefox version 33.0 with an Ubuntu 14.04 LTS operating system. I get a 403- Forbidden: access is denied message when trying to access my Microsoft Outlook Web App (OWA) email. When I use another computer running Firefox version 33.1.1 with a Window 7 operating system, I can access my Microsoft Outlook Web App email perfectly. Does anyone have any suggestions on how to get my Firefox browser on the Ubuntu machine to be able to access my email on OWA?

Asked by jwepman 6 years ago

Answered by cor-el 6 years ago

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Firefox will not access internet in Ubuntu 9.10 or 10.04

Installed Ubuntu 9.10 and 10.04. Firfeox will not access internet. Works fine in 9.04 This happened Every time Firefox opened … (read more)

Installed Ubuntu 9.10 and 10.04. Firfeox will not access internet. Works fine in 9.04

This happened

Every time Firefox opened

Asked by AnonymousUser 11 years ago

Answered by AnonymousUser 11 years ago

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How to turn off Java version check

I have a small Linux based pc running Firefox in kiosk mode. The pc is not connected to the Internet and only has acess to a dedicated server under my control, serving a … (read more)

I have a small Linux based pc running Firefox in kiosk mode. The pc is not connected to the Internet and only has acess to a dedicated server under my control, serving a few webpages and a java applet. Suddenly the system started complaining java my java version is outdated messing up the kiosk display.

- how did firefox figure out the java version is outdated if neither the frond end pc nor the back end server have access to the Internet - is there a way to turn off java security checking in one of the firefox config files? The kiosk pc boots from the network, the firefox profile is automatically generated, so I need a way to change this in the config files, not through the GUI as I won't be there every time the kiosk boots.

I'm running Firefox 13.0.1, I know this is old but security isn't an issue as I'm only accessing my own server and updating the firefox version on the PXE image is a pain.

Asked by systeemgod 8 years ago

Answered by systeemgod 8 years ago

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javascript error message: Error: TypeError: netscape.security. PrivilegeManager is undefined.

Support for enablePrivilege has been removed in Firefox (Bug 546848), so it is no longer possible to get special elevated privileges by using this method. If a web page … (read more)

Support for enablePrivilege has been removed in Firefox (Bug 546848), so it is no longer possible to get special elevated privileges by using this method.

If a web page (or local html page) is using this then they will have to use other ways get what they want like providing a Firefox extension.

Where is it possible to find an exension of this kind (if it exists)?

Asked by tiziano 8 years ago

Last reply by cor-el 8 years ago

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auto save changes made in inspector

I frequently work with Inspector in firefox and I want to save changes(atleast those I make in direct html or css code) to my source code. Is this possible with any add-o… (read more)

I frequently work with Inspector in firefox and I want to save changes(atleast those I make in direct html or css code) to my source code. Is this possible with any add-on or some in-built option in firefox?

Asked by Nitish 7 years ago

Answered by Marc Sances 7 years ago

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How to save username and password for proxy?

I'm using Firefox 41 for Linux 64 bit and I need to communicate over a proxy requiring authentication. I have to enter username and password after each start of Firefox. … (read more)

I'm using Firefox 41 for Linux 64 bit and I need to communicate over a proxy requiring authentication. I have to enter username and password after each start of Firefox. I found at this forum that setting of the following things in about:config would help but it does not:

network.negotiate-auth.allow-proxies : false network.proxy.share_proxy_settings  : false network.automatic-ntlm-auth.allow-proxies : false network.auth.use : false signon.autologin.proxy : true

So is there any way how to save the credentials to avoid repeated prompting for them in each new Firefox session?

Thank you for your help, Martin

Asked by martin.hruska 5 years ago

Answered by martin.hruska 5 years ago

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This Connection is Untrusted: accounts.google.com - can't add exception

I'm trying to use a ssl proxy with accounts.google.com. Usually, firefox warns me about invalid certs, however it let me add an exception if I wanted to connect to it any… (read more)

I'm trying to use a ssl proxy with accounts.google.com.

Usually, firefox warns me about invalid certs, however it let me add an exception if I wanted to connect to it anyway.

But, if i want to connect to accounts.google.com, it blocks me, and it doesn't let me add that exception.

Why it happens only with this subdomain?

Asked by Midix666 9 years ago

Answered by Vivek 9 years ago

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Linux, Firefox 21.0 and the latest flash FOR LINUX (11.2). I can't view youtube videos because firefox has disabled the plugin. Help!

One hour ago I was happily watching youtube videos under Linux using Firefox 20.0 and flash 11.2. I just updated firefox and it is now blocking my flash and prompting me … (read more)

One hour ago I was happily watching youtube videos under Linux using Firefox 20.0 and flash 11.2. I just updated firefox and it is now blocking my flash and prompting me to update. The problem is I can't update because 11.2 is the LAST flash plugin for firefox, there won't be any other version.

Is there a way to prevent firefox from disabling my plugin?

Asked by Arst 8 years ago

Answered by jnorden 8 years ago

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Suddenly always redirecting to https

I am running a local apache server for website development. I have always accessed these local sites with http:// Suddenly today firefox is redirecting to https:// and I … (read more)

I am running a local apache server for website development. I have always accessed these local sites with http://

Suddenly today firefox is redirecting to https:// and I receive the "Secure Connection Failed" error.

I have completely removed the firefox profile by deleting the ~/.mozilla and ~/.cache/mozilla directories, but the problem persists.

I have set browser.urlbar.autoFill to false, but the problem persists.

I am not running any extensions or add ons.

No changes to the apache configuration have been made.

No system updates have been installed since it was working yesterday.

Even with apache stopped, the local sites still immediately redirect to https://

The sites are directed to localhost via the /etc/hosts file, for example: 127.0.0.1 examplelocalsite.dev

I have restarted the computer and the problem persists.

The problem is not occurring in Chrome.

The problem is not occurring with external http:// websites.

I am not running any type of security software other than a basic firewall configuration with ufw

The problem persists with ufw disabled.

I have purged the firefox installation with apt purge firefox and reinstalled fresh but the problem persists.

Asked by tekhi 3 years ago

Answered by philipp 3 years ago

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Html marquee : stop() and start() work on firefox 26 but not on 27

this html/javascript line works on firefox 26 but not on firefox 27 <marquee onMouseOver='this.stop();' OnMouseOut='this.start();'>Hello</marquee> Why ? … (read more)

this html/javascript line works on firefox 26 but not on firefox 27

<marquee onMouseOver='this.stop();' OnMouseOut='this.start();'>Hello</marquee>

Why ?

Asked by willmath 7 years ago

Answered by mattlem 7 years ago

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Some Unicode characters are not displaying properly

I run into this mostly on Diaspora*, Gihub, and Wordpress sites. I either get the standard block character or something I've never seen before. see https://imgur.com/a/r5… (read more)

I run into this mostly on Diaspora*, Gihub, and Wordpress sites. I either get the standard block character or something I've never seen before.

see https://imgur.com/a/r5rvk for examples

Asked by teslas_moustache 7 years ago

Answered by jscher2000 7 years ago

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Gah. Your tab just crashed. Firefox 61

I haave firefox running on Ubuntu with firefox 61.01 and while watching Youtube videos either over 50 minutes or live the message "gah. your tab just crashed" would appea… (read more)

I haave firefox running on Ubuntu with firefox 61.01 and while watching Youtube videos either over 50 minutes or live the message "gah. your tab just crashed" would appear. When i go to about:crashes I do not see any crash reports.

I have tried disabling hardware acceleration clearing all stored information cookies, history etc..

Asked by Mace2 3 years ago

Answered by Mace2 2 years ago

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Update to Firefox 24 on Ubuntu 11.04

I have Ubuntu 11.04 and an old version of Firefox. I want to update to Firefox 24 but do not know how. When I download the update .zip file it still does not update. Can … (read more)

I have Ubuntu 11.04 and an old version of Firefox. I want to update to Firefox 24 but do not know how. When I download the update .zip file it still does not update. Can anyone help?

Asked by meself6390 7 years ago

Last reply by cor-el 7 years ago

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Does TLS 1.2 already enabled in firefox 57 ? Or do i need to make any changes in the default settings in order to make it active ?

I have updated my Firefox to the latest stable release 57 in a windows machine. I would like to know if TLS 1.2 is already enabled in my browser or do i need to make any … (read more)

I have updated my Firefox to the latest stable release 57 in a windows machine. I would like to know if TLS 1.2 is already enabled in my browser or do i need to make any changes in the default setup in order to make it active.

When i check "security.tls.version.min" it's shown "Value 1". Is that the right value to TLS 1.2 ?

Kindly advise.

Asked by vangoghvan 3 years ago

Answered by James 3 years ago