User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0 Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0 In an effect similar to the Flash page scrolling bug, scrolling up and down on a page with some Java applets causes the web page to be drawn over the Java applet's GUI panels until a repaint is triggered in the applet. Reproducible: Always Steps to Reproduce: 1. Load page 2. Scroll up and down repeatedly Actual Results: A copy of the area of a web page either above or below the Java applet panel is drawn into the panel. Expected Results: Page and applets should be separate. Windows 7 64-bit Nvidia GeForce 8600M GT, drivers 266.58 Screen resolution: 1920x1080 Using a 125% level zoom on the page Firefox 4 b10 (at least) through to RC1, 32-bit Java 6 update 23, 32-bit The source code for the applet on the example page is included on the page too, apparently.

Another example: http://www.java.com/en/download/testjava.jsp

Shows the repaint on animated coffee cup icon

Can you check out if this is dependent on D3D10 on/off and/or D2D on/off?

Yes, the bug could not be reproduced when hardware acceleration with D2D was disabled for both example sites.

Please post the Content of the Graphics Section you can get via "about:support" with enabled Hardware Acceleration.

Graphics Adapter Description NVIDIA GeForce 8600M GT Vendor ID 10de Device ID 0407 Adapter RAM 256 Adapter Drivers nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um Driver Version 8.17.12.6658 Driver Date 1-7-2011 Direct2D Enabled true DirectWrite Enabled true (6.1.7600.16763, font cache n/a) WebGL RendererGoogle Inc. -- ANGLE -- OpenGL ES 2.0 (ANGLE 0.0.0.541) GPU Accelerated Windows 1/1 Direct3D 10

Confirmed Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b13pre) Gecko/20110311 Firefox/4.0b13pre ID:20110311030408 Java(TM) Platform SE 6 U24 File: npjp2.dll Version: 6.0.240.7 Next Generation Java Plug-in 1.6.0_24 for Mozilla browsers Graphics Adapter Description: ATI Radeon HD 4300/4500 Series Vendor ID: 1002 Device ID: 954f Adapter RAM: 512 Adapter Drivers: aticfx64 aticfx64 aticfx32 aticfx32 atiumd64 atidxx64 atiumdag atidxx32 atiumdva atiumd6a atitmm64 Driver Version: 8.821.0.0 Driver Date: 1-26-2011 Direct2D Enabled: true DirectWrite Enabled: true (6.1.7601.17514, font cache n/a) WebGL Renderer: Google Inc. -- ANGLE -- OpenGL ES 2.0 (ANGLE 0.0.0.541) GPU Accelerated Windows: 1/1 Direct3D 10

This bug still exists in: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101 Firefox/5.0

The bug still exists in: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0) Gecko/20100101 Firefox/6.0

I can reproduce this in Firefox 10 on Windows 7, but only inconsistently (several attempts but only one success). Are you still able to reproduce this consistently?

Yes, I can still consistently (always) reproduce this bug on Firefox 9.0.1. Possibly related, but I can still also reproduce the Flash version of this bug on YouTube, but less reliably.

This bug is still present in Firefox 11.0.

i confirm this bug. Windows 7, Firefox 11, Nvidia Graphic Card.

This bug is still present in Firefox 12.0.

Related bug: https://bugzilla.mozilla.org/show_bug.cgi?id=730640

This bug is still present in Firefox 13.0.

This bug is still present in Firefox 14.0.1.

This bug is still present in Firefox 15.0.

This bug is never fixed, so I switched to Google Chrome.

So did I, and our support departement no longer suggests Firefox but Chrome as our preferred browser. We still get approximately 350 calls and emails per week with people having problems with IE (or Firefox) which we suggest to run Chrome instead.

This bug is still present in Firefox 20.0.1.

The HTML <applet> element and related java functionality was removed from Gecko in Bug 1279218. Marking related bugs as invalid.