You can set Firefox to use the default theme. Open the add-ons manager (in the tools menu select Add-ons), in the add-ons manager go to the Themes panel. Click on the Default theme in the list of themes then click on the "Use Theme" button.

For more details see using themes with Firefox.

Your above posted system details show outdated plugin(s) with known security and stability risks.

• Next Generation Java Plug-in 1.6.0_17 for Mozilla browsers

Update the Java plugin to the latest version.

• http://java.sun.com/javase/downloads/index.jsp (Java Platform: Download JRE)

See also Personas