This forum focuses on end-user support, so you may not get much response here to this question. You

This forum focuses on end-user support, so you may not get much response here to this question. You can find more web development help on the mozillaZine Web Development board. Separate forum, separate registration. Please note the tips in the Sticky Post at the top of the forum before posting.

(It will help to post a link to a test case demonstrating the problem.)