Mozilla Firefox needed an update, and it also had a lot of old Java plugins. My suggestion is to uninstall it completely in Add Remove programs. Then restart the computer and install it fresh from here:
http://www.mozilla.com/en-US/firefox/ie.html
Unless you can give me an error message or more information, the only thing I can think about the flickering of the monitor is to suggest you check all attachments from the monitor to the computer. Make sure the two skrews are in tight. This is the time of the year for power issues with summer storms, make sure that is not the problem.
Hope that helps.
http://www.mozilla.com/en-US/firefox/ie.html
Unless you can give me an error message or more information, the only thing I can think about the flickering of the monitor is to suggest you check all attachments from the monitor to the computer. Make sure the two skrews are in tight. This is the time of the year for power issues with summer storms, make sure that is not the problem.
Hope that helps.