Closed Bug 752746 Opened 10 years ago Closed 10 years ago

can't make liveconnect calls from javascript to applet's method


(Core :: Plug-ins, defect)

Not set



Tracking Status
firefox14 + unaffected
firefox15 + unaffected
firefox16 --- unaffected


(Reporter: calvin.cheung, Assigned: johns)



(Keywords: regression, testcase)


(2 files)

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; .NET4.0C; .NET4.0E; BRI/2; .NET CLR 2.0.50727)

Steps to reproduce:

Using the nightly 15.0a1 (2012-05-07) from
Tested on windows XP with JRE 7u4 (downloaded from

Ran some liveconnect (javascript calling into applet's method) testcases.

I'm attaching 2 testcases.
Both are liveconnect calls from javascript into applet's method.
The class files were compiled with jdk7.

StringTest - calls into applet's method upon "OnLoad"
JSJavaTest1 - calls into applet's method upon clicking on the javascript

My observation is that the java plugin module (npjp2.dll) wasn't loaded when
running the above tests.

Actual results:

Nothing happened.

Expected results:

Liveconnect calls should be successful.
Assignee: nobody → joshmoz
Assignee: joshmoz → nobody
Blocks: 748343
Component: Untriaged → DOM
Ever confirmed: true
Keywords: regression
Product: Firefox → Core
QA Contact: untriaged → general
Requesting tracking for the regression.
Assigning back to Josh
Assignee: nobody → joshmoz
My debugging indicates that this is failing because we fail to create a Java plugin instance because we don't have an object frame. This makes me think this is a regression from bug 90268 or its follow-up fixes, not from the DOM object removal. The fact that this bug exists on Aurora, where we didn't remove the DOM object support, confirms my theory.
This works in the current Firefox 13 Beta, but not the current Firefox 14 Aurora or Firefox 15 Nightly.

This means bug 748343 isn't the regressing bug, removing it from the deps.
No longer blocks: 748343
Summary: fix for 748343 prevents liveconnect calls from javascript to applet's method → can't make liveconnect calls from javascript to applet's method
Version: 15 Branch → 14 Branch
Duplicate of this bug: 753280
Tracking for 14, can we get a regression range here?
Keywords: testcase
From hg bisect:

The first bad revision is:
changeset:   87974:1e4675fb8fc9
user:        John Schoenick <>
date:        Mon Feb 27 13:58:00 2012 -0800
summary:     Bug 406541 - Ensure we agree with java on applet codebase, and run security checks for file: codebase URIs. r=jst
Depends on: CVE-2013-1717
Depends on: 745030
406541 exposed several issues in the objectloadingcontent code, 745030 should fix this
Assignee: joshmoz → jschoenick
Component: DOM → Plug-ins
OS: Windows XP → All
QA Contact: general → plugins
Hardware: x86 → All
Note that 406541 is going to be backed out from 14 due to all the issues depending on 745030, which will be too big a change for backporting
This bug blocks bug 406541 and doesn't depend on it. Can someone change the dependency?
No longer depends on: CVE-2013-1717
(In reply to John Schoenick [:johns] from comment #10)
> Note that 406541 is going to be backed out from 14 due to all the issues
> depending on 745030, which will be too big a change for backporting

John - are you planning to fix this for FF14 (shipping in 4 weeks), or would you like to make the case for untracking? We haven't seen a status update here in a while.
This is a similar regression to bug 736965, so my comments there apply - bug 745030 is the proper fix for this, but 406541 will be backed out of the affected versions until 745030 is ready (a rather large patch). 

This could probably be duped against bug 736965, but I'd like to keep it open to make sure we've covered all known regression issues. It is probably redundant to track it, however
Version: 14 Branch → 15 Branch
Bug 406541 has been backed out of all branches, so this regression should be no more
Closed: 10 years ago
Resolution: --- → FIXED
Version: 15 Branch → unspecified
You need to log in before you can comment on or make changes to this bug.