I have Windows XP and Pavilion computer. PentiumR 4 with hyperthreading Tech. CPU 2.80GHz 160GB hard drive.
2.80GHz 504 MB of RAM
What doesn't meet the requirement?
Your user agent identifies you as such:
Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:22.214.171.124) Gecko/20081217 Firefox/126.96.36.199
Looks that you have a pref general.useragent.override to set that user agent.
Other things that need attention:
Your above posted system details show outdated plugin(s) with known security and stability risks that you should update.
Update the Java plugin to the latest version.
Update the Flash plugin to the latest version.