User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0 Build ID: 20161019084923 Steps to reproduce: I have a website with a flash based picture uploader (Uploadify). I have a background image in a div, which is the image the user clicks, then uploads pictures. Right now, with dom.ipc.plugins.asyncdrawing.enabled;true I have a BLANK flash object, without this picture. If I set asyndrawing to FALSE, everything works perfectly. Actual results: Blank flash object insted of the pictured Expected results: Show the picture with the flash

Thanks for reporting this! Please provide either a public URL so others can try to reproduce, or attach a minimal, self-contained testcase here.

Of course. www.fotosa.csib.hu You must log in to test it. My login is: User:csabaaron@gmail.com Pw:asdf123 Then click on an gift, then try to upload a picture. You will get the result is I mentioned above (attached the pic) Thanks

I could not reproduce the issue on Firefox 49.0.2 (Build ID 20161019084923 - both 32/64-bit builds) with Flash 23.0.0.185 on the following OS-es and Graphics: - Windows 10x64 - Intel(R) HD Graphics - Windows 10x64 - AMD Radeon HD 5450 - Windows 7x64 - NVIDIA GeForce 210 - Mac OS X 10.12 - Intel Iris Pro 1536 MB I could upload images from all these OS-es. Can you reproduce in Safe Mode [1] or with a new profile[2]? Also could you provide your graphics info from about:support, please? [1] https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode [2] https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

This appears to be yet another painting issues.

we don't have good access to this site currently to test.