619399 - ParaChat Java applet fails to work if content policy is present (Adblock Plus, NoScript, GreaseMonkey...)

Status: RESOLVED WONTFIX

(Core Graveyard :: Plug-ins, defect)

Description

[Wladimir Palant]

Attachment: Minimized testcase

For some reason, this issue is only reproducible on Ubuntu (10.10), I couldn't reproduce it on OpenSUSE. To reproduce open the testcase attached - normally the applet loads and you are asked for your password. If however an extension is installed that uses the content policy mechanism (e.g. Adblock Plus or the minimal content policy extension) all you get is a hang while the applet loads and then a gray rectangle. When the tab is closed the following error message appears in the console:

> Exception in thread "main" netscape.javascript.JSException: Plugin instance for applet ID 1 was already released
>   at sun.plugin2.main.server.LiveConnectSupport.getInfo(LiveConnectSupport.java:405)
>   at sun.plugin2.main.server.LiveConnectSupport.shutdown(LiveConnectSupport.java:41)
>   at sun.plugin2.main.server.JVMInstance.unregisterApplet(JVMInstance.java:1300)
>         ...

That's using Sun Java 6u22. Same results with the distribution-supplied Firefox 3.6.10 as well as with the official Firefox 3.6.13 and Minefield 20101214 build.

Comment 1

[Wladimir Palant]

Attachment: Minimal content policy for testing

Comment 2

[Wladimir Palant]

Attachment: WinDbg log

You probably want to skip to the end of the debug log - it took me some time to figure out which exception is the relevant one (CpupSyscallStub it seems, the access violations happen when the images are still loading and don't cause a crash).

Comment 3

[Wladimir Palant]

Comment on attachment 497837 [details]
WinDbg log

Sorry, wrong bug.

Comment 4

[Michael Lueck]

I originally reported it to Wladimir with my system loaded with Ubuntu 9.04 and the official build of Firefox installed via UbuntuZilla.

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13

Here is the discussion thread in the AdBlock Plus forum:
https://adblockplus.org/forum/viewtopic.php?f=1&t=6375

Comment 5

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

I'm marking this bug as WONTFIX per bug #1269807.

For more information see - https://blog.mozilla.org/futurereleases/2015/10/08/npapi-plugins-in-firefox/