hi CindyAG, please also make sure that you're not running firefox in compatibility mode: https://support.microsoft.com/en-us/kb/292533

CindyAG said

V36 updated and I can no longer use my search feature. When I type in the field nothing happens.

I don't have a box checked for anything. I have Windows XP. Everything was fine until this morning.

the useragent of the browser identifies your system as Windows NT 4.0 which is highly unusual and might be cause for various problems. if you don't run firefox in compatibility mode, are you using other tools like a sandbox or addons modifying the useragent that might interfere here?

also, could you go to the firefox menu ≡ > help ? > troubleshooting information, copy the contents of that page and paste them here into a reply on the forum? this might give us a clue what is going on...

Troubleshooting Information This page contains technical information that might be useful when you're trying to solve a problem. If you are looking for answers to common questions about Firefox, check out our support website. Application Basics Name Firefox Version 36.0.4 Update History User Agent Mozilla/5.0 (Windows NT 4.0; rv:36.0) Gecko/20100101 Firefox/36.0 Profile Folder Enabled Plugins about:plugins Build Configuration about:buildconfig Memory Use about:memory Multiprocess Windows 0/1 Crash Reports for the Last 3 Days Report ID Submitted

All Crash Reports Extensions Name Version Enabled ID Graphics Important Modified Preferences Name Value Important Locked Preferences Name Value JavaScript Incremental GC Accessibility Activated Prevent Accessibility Library Versions Experimental Features Name ID Description Active

I don't understand any of this. I don't know of any sandbox or addons.

Make sure that you do not run Firefox in compatibility mode. You can open the Properties of the Firefox desktop shortcut via the right-click context menu and check the "Compatibility" tab. Make sure that all items are deselected in the "Compatibility" tab of the Properties window.

I did as suggested and it worked. Thank you all for helping me.