User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:55.0) Gecko/20100101 Firefox/55.0 Build ID: 20170814072924 Steps to reproduce: We have a application under flash player and several font disappear. The text is white on white background. This problem come only firefox 55.0.2(32 bits), flash player ( version 220.127.116.11) under windows 2012 but not under other windows. The bug appeared after the fire update and arrives all the time Actual results: The text display is white on white background under windows server 2012. Expected results: To temporarily fix the bug, we disabled the performance.
Can you provide a link to affected content?
Created attachment 8902253 [details] oharas white under windows server 2008
L'url is https://app.o-haras.com/oharas-demo. It is an application for horse. I added one attached file.
Can you post your about:support text please? I think this is specific to your device. This site displays correctly on my system. I think this might have something to do with acceleration support.
As I wrote in bug 1347575 (probably a dup) many users are affected by the white text issue on the popular Japanese video site and other Flash content. For example, this person has encountered the issue on an uploader: https://twitter.com/siriusPSO/status/902550007013769216
I've contacted adobe on this.