[Bug 2687] New: [1.5-2+deb8u1] Impossible to interact with some buttons on a Java application hosted on the embedded web server of a Mitsubishi air conditioner controller

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=2687

            Bug ID: 2687
           Summary: [1.5-2+deb8u1] Impossible to interact with some
                    buttons on a Java application hosted on the embedded
                    web server of a Mitsubishi air conditioner controller
           Product: IcedTea-Web
           Version: 1.5
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Plugin
          Assignee: jvanek at redhat.com
          Reporter: tempaccount325 at outlook.com
                CC: unassigned at icedtea.classpath.org

Created attachment 1434
  --> http://icedtea.classpath.org/bugzilla/attachment.cgi?id=1434&action=edit
Compressed folder of screenshots.

I have attached a compressed folder with the images I comment on below.

==== System Info ====

Distributor ID:    Debian
Description:    Debian GNU/Linux 8.2 (jessie)
Release:    8.2
Codename:    jessie
Kernel: 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u4 (2015-09-19) x86_64
GNU/Linux


=== Summary of the issue ===
I was never able to fully interact with a Java application running on an
embedded web server of a Mitsubishi air conditioner controller (model
GB-50ADA). This device sits within the Local Area Network at a nearby business
and controls about 50 individual machines. 
I used the Iceweasel browser (version 38.3.0) with Debian's respective
IcedTea-web plugin (version 1.5-2+deb8u1). Both were installed through the
package manager using Debian's repository.
Normally, the screen you see on image "4" should allow you to click on any of
the air conditioner icons and the application should update showing you
specific settings for the icon you clicked. This is what I get in various
versions of Windows running Firefox with Oracle's Java plugin. However, on
Iceweasel I cannot click anything beyond the various groups of underlined
words. I believe these are part of the Java application since clicking them
will not affect the browser's address and show a Java security warning (such as
"1", "2" and "3"). I can accept or decline the application to run and
thereafter the browser updates with the desired content.
Secondly, if I right-click the area where the air conditioner icons are
located, no context menu shows up, while anywhere above and including
"Overview" will show me the standard menu for HTML pages.

=== General Notes ===
I am mostly a consumer when it comes to Java Applications, so I have no idea
how to debug this, if it's even a bug.
There are no error messages or crashes either by Iceweasel or IcedTea.
The system load seems normal when on the problematic screen.
There is a login prompt prior to what is shown on image "4".
The controller seems like a proprietary system.
I am not permitted to give anyone else access to the controller due to the
business policy.
I have searched through all of the existing bugs and found nothing that seems
relevant.
Advanced searches on Google for this device's model and Java have proven
fruitless.
The device's manual assumes the usage of Windows and Oracle's Java.

I think more information is needed, but I do not know where or how to find it.
Therefore, I would appreciate some assistance in that regard.

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