Reproducible on: Firefox 21.0 beta 1 (20130401192816) Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:21.0) Gecko/20100101 Firefox/21.0 Latest Aurora (20130402004013) Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:22.0) Gecko/20130402 Firefox/22.0 Latest Nightly (20130402030843 Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:23.0) Gecko/20130402 Firefox/23.0 Steps to reproduce: 1. Open Firefox with Java installed 2. Open http://www.walter-fendt.de/ph14e/keplerlaw2.htm or http://www.walter-fendt.de/ph14e/pulleysystem.htm 3. From the drop down list try to select other option Expected result: Drop down list should be in it's place. Actual result: Drop down list is in different location (see attachement). Last good nightly: 2012-12-22 First bad nightly: 2012-12-23 Pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=bf26f61a0748&tochange=84320dffec6e Maybe bug 823559?

(In reply to Virgil Dicu [:virgil] [QA] from comment #0) > Maybe bug 823559? Does setting "dom.ipc.plugins.java.enabled" back to "false" fix it?

(In reply to Georg Fritzsche [:gfritzsche] from comment #1) > Does setting "dom.ipc.plugins.java.enabled" back to "false" fix it? dom.ipc.plugins.enabled.i386.javaplugin2_npapi.plugin - false dom.ipc.plugins.enabled.i386.javaappletplugin.plugin - false and the issue is still there.

(In reply to Virgil Dicu [:virgil] [QA] from comment #2) > dom.ipc.plugins.enabled.i386.javaplugin2_npapi.plugin - false > dom.ipc.plugins.enabled.i386.javaappletplugin.plugin - false Please try toggling "dom.ipc.plugins.java.enabled". I realise now that it's probably not present, so add it manually and set it to false to test.

Nominating for tracking since this is a regression.

I almost WONTFIXed this, but I really don't think it's worth tracking and prioritizing compared with our total list of things to work on.

(In reply to Georg Fritzsche [:gfritzsche] from comment #3) > Please try toggling "dom.ipc.plugins.java.enabled". > I realise now that it's probably not present, so add it manually and set it > to false to test. I added manually "dom.ipc.plugins.java.enabled", set to false, and the issue is solved.

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/