Something that you have installed has changed your User Agent or is keeping your User Agent from updating with the new install/update of Firefox. I suspect that it is Fast Browser Search which is shown as part of your User Agent. To get rid of Fast Browser Search do the following: #Close Firefox (Firefox button > Exit '''''OR''''' File > Exit) #Open the Windows Control Panel and remove/uninstall "Fast Browser search protection" and "Fast Browser Search" (MyWebTatoo) #*See --> http://support.microsoft.com/kb/307895 #*Your User Agent: ''Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.15) Gecko/2009101601 Firefox/3.0.15 (.NET CLR 3.5.30729) <u>FBSMTWB</u>''''' #*What is a User Agent: http://en.wikipedia.org/wiki/User_Agent #Start Firefox #*Reset your User Agent following the instructions in the article below: #**See --> [https://support.mozilla.com/en-US/kb/websites%20or%20add-ons%20incorrectly%20report%20incompatible%20browser#w_reset-your-user-agent Reset your user agent] #*Check your Firefox version: #**See --> [https://support.mozilla.com/en-US/kb/Finding+your+Firefox+version Finding your Firefox version] '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.''' ------------------------- Not related to your question, but... You may need to update some plug-ins. Check your plug-ins and update as necessary: *Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/ *Adobe Shockwave for Director Netscape plug-in: [https://support.mozilla.com/en-US/kb/Using%20the%20Shockwave%20plugin%20with%20Firefox#w_installing-shockwave Installing ('''''or Updating''''') the Shockwave plugin with Firefox] *Adobe PDF Plug-In For Firefox and Netscape: [https://support.mozilla.com/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox] *Shockwave Flash (Adobe Flash or Flash): [https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin#w_updating-flash Updating Flash in Firefox] *Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]