Could be those numerous AVG and/or ZoneAlarm extensions. Try disabling those first, restart Firefox, test. If that solves the problem, re-enable one at a time, restart Firefox, and test until the problem occurs, then you know the culprit. If those testing those extensions does not resolve the problem, you may need to try Firefox Safe Mode * You may need to use '''Safe Mode''' to locate the problem: **See: ***https://support.mozilla.com/en-US/kb/Safe%20Mode ***http://kb.mozillazine.org/Safe_Mode **Firefox 4 & 5 users, hold the Shift key while clicking the Firefox 4 desktop icon to enter Safe Mode. **Firefox Safe Mode is a diagnostic mode that disables Extensions and some other features of Firefox. ***In Firefox 4, Safe Mode also disables Plugins and Hardware Acceleration. ***If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes '''<u>before</u>''' starting Safe Mode (In Firefox 4, Tools > Add-ons > Appearance). See: http://support.mozilla.com/en-US/kb/Using%20themes%20with%20Firefox#w_managing-themes-and-personas ***When entering Safe Mode, do not check any items on the entry window, just click "Continue in Safe Mode". ***Test to see if the problem you are experiencing is corrected. ** If the problem does not occur in Safe-mode then disable all of your Extensions and Plug-ins and then try to find which is causing it **#by enabling '''<u>one at a time</u>''' until the problem reappears. **#You can also enable a few at a time (3-5), keeping track of what you just re-enabled to see if the problem re-occurs; this will help narrow down the possibilities if you have a large number of add-ons. **#'''<u>You MUST close and restart Firefox after EACH change</u>''' via File > Restart Firefox (on Mac: Firefox > Quit). **#You can use "Disable all add-ons" on the Safe Mode start window. *See the following for more information ** http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes ** http://support.mozilla.com/en-US/kb/Troubleshooting+plugins ** http://support.mozilla.com/en-US/kb/Basic+Troubleshooting ---------------------------- Delete the old Java Consoles listed below (in Add-ons > Extensions) by following the instructions in this article:http://kb.mozillazine.org/Java#Multiple_Java_Console_extensions *Java Console 6.0.21 {CAFEEFAC-0016-0000-0021-ABCDEFFEDCBA} *Java Console 6.0.22 {CAFEEFAC-0016-0000-0022-ABCDEFFEDCBA} <br /> -------------------------- <br /> '''You need to update the following.''' The Plugin version(s) shown below was/were submitted with your question and is/are out of date. You should update to avoid known security issues with the version(s) you have installed. Click on "More system info..." to the right of your question to see what was included with your question. *Adobe Shockwave for Director Netscape plug-in, version 11.5.9.620 *Next Generation Java Plug-in 1.6.0_24 for Mozilla browsers #'''''Check your plugin versions''''' on either of the following links': #*http://www.mozilla.com/en-US/plugincheck/ #*https://www-trunk.stage.mozilla.com/en-US/plugincheck/ #*'''Note: plugin check page does not have information on all plugin versions''' #*There are plugin specific testing links available from this page: #**http://kb.mozillazine.org/Testing_plugins #'''Update Shockwave for Director''' #*NOTE: this is not the same as Shockwave Flash; this installs the Shockwave Player. #*Use Firefox to download and SAVE the installer to your hard drive from the link in the article below (Desktop is a good place so you can find it). #*When the download is complete, exit Firefox (File > Exit) #*locate and double-click in the installer you just downloaded, let the install complete. #*Restart Firefox and check your plugins again. #*'''<u>Download link and more information</u>''': http://support.mozilla.com/en-US/kb/Using+the+Shockwave+plugin+with+Firefox #'''Update the [[Java]] plugin''' to the latest version. #*Download site: http://www.oracle.com/technetwork/java/javase/downloads/index.html (Java Platform: Download JRE) #**'''''Be sure to <u>un-check the Yahoo Toolbar</u> option during the install if you do not want it installed. #*Also see "Manual Update" in this article to update from the Java Control Panel in Windows Control Panel: http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates #* Removing old versions (if needed): http://www.java.com/en/download/faq/remove_olderversions.xml #* Remove multiple Java Console extensions (if needed): http://kb.mozillazine.org/Firefox_:_FAQs_:_Install_Java#Multiple_Java_Console_extensions #*Java Test: http://www.java.com/en/download/help/testvm.xml

thanks i will try that

it was those AVG extensions