419824 - Firefox 3.0b3 regression in signed applet- JSObject.getWindow(this) returns null

Status: VERIFIED DUPLICATE of bug 421855

(Core Graveyard :: Java: OJI, defect)

Description

[Bhavesh Patel]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12
Build Identifier: Firefox/3.0b3

We have an existing applet (signed applet) which work on Firefox older versions and on Firefox 3.0b2 with some problem but now on Firefox 3.0b3 applet throws null pointer exception. 
 
It looks like there are some regression in Java Embedding plugin.

Earlier a have logged a bug for Firefox 3.0b2 https://bugzilla.mozilla.org/show_bug.cgi?id=411117.


Reproducible: Always

Steps to Reproduce:
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Comment 1

[Bhavesh Patel]

Attachment: Applet html

Comment 2

[Bhavesh Patel]

Attachment: Test Applet jar

Comment 3

[Bhavesh Patel]

The problem is with JSObject.getWindow(this) this method return null in FireFox 3.0b3 and 3.0b4. This code works fine till Firefox 3.0b2.

Two files attached applet.html (in Applet html attachment) and testApplet.jar (in Test Applet jar attachment). To run applet jaws.jar will also be required.

Run the applet, in console it will print the object returned from JSObject.getWindow(this).

Comment 4

[Bhavesh Patel]

Attachment: Source code of TestApplet

Comment 5

[Bhavesh Patel]

Attachment: Sample Test Application

Attachment contains source and test application.

Unzip Attachment
Run the applet.html, in console it will print the object returned from
JSObject.getWindow(this).

Comment 6

[Kevin Yank]

I can confirm the problem still exists in Firefox 3.0b5.

This bug effectively breaks Java-to-JavaScript communication in Firefox. It is an immensely critical bug for many applications.

Comment 7

[Kevin Yank]

Here’s an easy URL to reproduce this issue:

http://www.editize.com/democms.php

The error message that appears is caused by this bug, and the stack trace is output to the Java console.