Use a Netscape Code Signing certificate

Signtool does not work great with Netscape 7.x or Mozilla. You can get your certificate with these tools but then export and import it in a Netscape 4.7x. Then use Signtool from Netscape repertory.

To get Signtool and sign JAR, see:
http://www.thawte.com/ssl-digital-certificates/technical-support/code/tools.html

Use Signtool to sign JAR. Here is the documentation: http://docs.sun.com/source/816-6164-10/contents.htm

Documentation about rights is here: http://docs.sun.com/source/816-6165-10/contents.htm

External links

http://www.thawte.com/ssl-digital-certificates/technical-support/code/nsobject.html