In order to be able to find the correct solution to your problem, we require some more non-personal information from you. Please do the following:

• Click the Firefox button at the top left, then click the Help menu and select Troubleshooting Information from the submenu. If you don't have a Firefox button, click the Help menu at the top and select Troubleshooting Information from the menu.

Now, a new tab containing your troubleshooting information should open.

• At the top of the page, you should see a button that says "Copy text to clipboard". Click it.
• Now, go back to your forum post and click inside the reply box. Press Ctrl+V to paste all the information you copied into the forum post.

If you need further information about the Troubleshooting information page, please read the article Use the Troubleshooting Information page to help fix Firefox issues.

Thanks in advance for your help!

You can try basic steps like these in case of issues with web pages:

Reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.

• Hold down the Shift key and left-click the Reload button
• Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• Press "Command + Shift + R" (Mac)

Clear the cache and the cookies from websites that cause problems.

"Clear the Cache":

• Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

• Firefox/Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Firefox/Tools > Add-ons > Appearance).

• Do NOT click the Reset button on the Safe Mode start window.

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

here you go

 Application Basics

       Name
       Firefox

       Version
       23.0.1

       User Agent
       Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0

       Build Configuration

         about:buildconfig

 Extensions

       Name

       Version

       Enabled

       ID

       RealDownloader
       1.3.3
       true
       {DF153AFF-6948-45d7-AC98-4FC4AF8A08E2}

 Important Modified Preferences

     Name

     Value

       browser.cache.disk.capacity
       358400

       browser.cache.disk.smart_size.first_run
       false

       browser.cache.disk.smart_size.use_old_max
       false

       browser.cache.disk.smart_size_cached_value
       358400

       browser.places.smartBookmarksVersion
       4

       browser.startup.homepage_override.buildID
       20130814063812

       browser.startup.homepage_override.mstone
       23.0.1

       dom.mozApps.used
       true

       extensions.lastAppVersion
       23.0.1

       network.cookie.prefsMigrated
       true

       places.history.expiration.transient_current_max_pages
       13196

       plugin.disable_full_page_plugin_for_types
       application/pdf

       plugin.importedState
       true

       privacy.sanitize.migrateFx3Prefs
       true

 Graphics

       Adapter Description
       Mobile Intel(R) 945 Express Chipset Family

       Adapter Drivers
       igxprd32

       Adapter RAM
       Unknown

       Device ID
       0x27ae

       Direct2D Enabled
       Blocked for your graphics driver version.

       DirectWrite Enabled
       false (0.0.0.0)

       Driver Date
       2-15-2008

       Driver Version
       6.14.10.4926

       GPU #2 Active
       false

       GPU Accelerated Windows
       0/1 Basic

       Vendor ID
       0x8086

       WebGL Renderer
       Google Inc. -- ANGLE (Mobile Intel(R) 945 Express Chipset Family)

       AzureCanvasBackend
       skia

       AzureContentBackend
       none

       AzureFallbackCanvasBackend
       cairo

 JavaScript

       Incremental GC
       true

 Accessibility

       Activated
       false

       Prevent Accessibility
       0

 Library Versions

       Expected minimum version

       Version in use

       NSPR
       4.10
       4.10

       NSS
       3.15 Basic ECC
       3.15 Basic ECC

       NSSSMIME
       3.15 Basic ECC
       3.15 Basic ECC

       NSSSSL
       3.15 Basic ECC
       3.15 Basic ECC

       NSSUTIL
       3.15
       3.15

Did the clear cache cor-el stated help in anyway?

yep cache clear out already

If you disable your RealPlayer/RealDownloaders plugins and extensions, does that make any difference?

orange Firefox button (or Tools menu) > Add-ons > Plugins category
orange Firefox button (or Tools menu) > Add-ons > Extensions category

Usually a link will appear above a disabled extension to restart Firefox. You can complete your work on the add-ons page and click the link as the last step.

i have RealDownloaders plugins But disabling did not help!But I think that the problem is temporarily solved!Following the cor-el instructions / clean up my system using CCleaner program.

I still need help http://support.emsisoft.com/topic/12328-strange-new-problem-in-access-to-youtube/?p=88008

Could you test in a new profile?

Exit Firefox and start up in the Profile Manager by pasting the following into the Run box on the Windows Start menu and pressing Enter:

firefox.exe -P

Click the Create Profile button and accept the suggested location. (To avoid data loss do not choose the location of any existing folder containing data.) Then Start Firefox using the new profile. (More info on the Profile Manager: Profile Manager - Create, remove or switch Firefox profiles)

Any difference on Youtube?

After testing, to switch back to your regular profile, exit Firefox, start up the profile manager, select your regular profile, and Start Firefox.

I recommend not deleting any profiles without first making a backup of all of them, just in case something were to go wrong during the deletion process.

I have tried so many ways using the CCleaner program and switch the status of Firefox from normal mode to "safe mode" but this did not help even with the "safe mode" So there is no other solutions to resolve this problem and I'm working with virus experts team . and Did not know the cause of the problemnow!

Probably is a bug since the release of Firefox version 23.0 is out and we want you to check it out as soon as possible or we will find an alternative Web browser!

the problem is that CCleaner is known to corrupt the firefox profile, make a exception of the firefox profile folder in CCleaner so you don't get such.

• Profiles - Where Firefox stores your bookmarks, passwords and other user data - For locating the profile

Also does this work fine in any other browsers?

I would like to inform you that there is a problem also subscribe YouTube and I can not subscribe to a lot of channels!

This works fine with a previous Firefox / other browsers no such problems

and Shut down the computer unexpectedly cause a problem loading the YouTube page!?

see my video http://www.youtube.com/watch?v=0JqCSJfw1dE

Hi G-hot, I'm not sure from your replies whether you tested in a new profile: https://support.mozilla.org/en-US/questions/971257#answer-482048

Clear the cache and the cookies from websites that cause problems.

"Clear the Cache":

• Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

• Firefox/Tools > Options > Privacy > Cookies: "Show Cookies"

If clearing cookies doesn't work then it is possible that the cookies.sqlite file that stores the cookies is corrupted.

Rename (or delete) cookies.sqlite (cookies.sqlite.old) and delete other present cookie files like cookies.sqlite-journal in the Firefox profile folder in case the file cookies.sqlite got corrupted.

• http://kb.mozillazine.org/Cookies
• https://support.mozilla.org/kb/Deleting+cookies

hi jscher2000, Do I really need to create a new profile?What will this benefit?

Clear and delete cookies and temporary Internet files, etc. ..Using many programs did not help to fix the problem and go to the Troubleshooting Information then click on reset Firefox browser settings helped to temporarily fix the problem!But after a period of time the problem go back again so there is no solution yet?

I also did what in the cor-el instructions by deleting cookies manually go to "Clear the Cache":

   Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now" 

"Remove Cookies" from sites causing problems:

   Firefox/Tools > Options > Privacy > Cookies: "Show Cookies"  even this did not help either

Hi G-hot, you wrote:

hi jscher2000, Do I really need to create a new profile?What will this benefit?

It's a test. If it works, there is a problem in your existing profile settings. If it doesn't work, there is a problem with Firefox program files or some external software on your computer or the website.