My firefox does not work all of a sudden.

I use firefox for a year now without any problems and all of a sudden, it doesn't work and I tried everything. I downloaded firefox 4 and it worked, but it's not compatible with my studies online. Does anyone know what I can do? I have a Windows 7.

You have this problem when running in Firefox SafeMode?

http://support.Mozilla.com/en-us/KB/safe+mode

Do not choose anything at the moment, just use 'continue in safe mode.

If this is not the case, see this:

http://support.Mozilla.com/en-us/KB/troubleshooting+extensions+and+theme...

Tags: Firefox

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