FULL PRODUCT VERSION :
java version "1.6.0_18"
Java(TM) SE Runtime Environment (build 1.6.0_18-b07)
Java HotSpot(TM) Server VM (build 16.0-b13, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux 2.6.18-164.10.1.el5PAE #1 SMP Thu Jan 7 20:37:53 EST 2010 i686 i686 i386 GNU/Linux


EXTRA RELEVANT SYSTEM CONFIGURATION :
Firefox 3.5.7

A DESCRIPTION OF THE PROBLEM :
I am trying out the new functionality to allow deployment of JNLP files without the codebase - to do this I use the JavaScript functionality at http://java.com/js/deployJava.js. I have a link of
<a href="javascript:deployJava.launchWebStartApplication('http://web.example.com/webstart/app.jnlp&#39;);">WebStart</a></td>

Clicking on this link correctly launches my application if I have JRE 1.6.0_18 installed. However, my browser history now contains two extra entries, a "wyciwyg" link and the current page again. This means that clicking "Back" now relaunches the WebStart application instead of going back one page.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Open Firefox
2. Go to http://www.google.com
3. Go to http://java.sun.com/docs/books/tutorial/deployment/webstart/examples/dist/webstart_ComponentArch_DynamicTreeDemo/JavaWebStartAppPage_No_Codebase.html
4. Click on either the text link or the Launch icon - the application launches
5. Close the webstart application that just launched
6. Click on the "Back" button of the browser

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
After clicking "Back", we should be back at the Google home page.
ACTUAL -
The webstart application is launched a second time and Firefox presents a blank page.

REPRODUCIBILITY :
This bug can be reproduced always.

Release Regression From : 6u17
The above release value was the last known release where this
bug was not reproducible. Since then there has been a regression.
this functionality did not exist in 6u17, so it cannot be the case that this behavior is a regression in 6u18.