Note: In some cases, the pluginreg.dat file and the about:plugins list may contain outdated information, even after a restart. To refresh the list, close your Mozilla application and delete (or rename) the "pluginreg.dat" file in the Firefox profile folder or SeaMonkey profile folder. A new pluginreg.dat file will be generated when you restart the browser but any plugins you may have disabled in the Add-ons Manager will be re-enabled (see above). [8] [9]