Java Struts1.2 Firefox Functionality Fix

I'm encountering issues with the functionality of my Java Struts 1.2 application, exclusively on Firefox. Specifically, I am struggling with form submission issues where errors appear upon submission. I can provide more insight into the exact error message on a direct basis as it would be most accurate to show this online. Ideally, I'm looking for a freelancer who has:

- In-depth understanding of Java Struts
- Detailed knowledge of Firefox compatibility
- Ability to diagnose and troubleshoot error messages
- Excellent communication skills for effective online error display