User Agent: Mozilla/5.0 (Android 5.0; Mobile; rv:48.0) Gecko/48.0 Firefox/48.0 Build ID: 20160620144418 Steps to reproduce: Turned off transitions in developer options. There is no reason to do this. Actual results: Page content that is scrollable whites out when scrolled too quickly. Usually temporarily, sometimes until refreshed. Expected results: No blanking. Window transitions shouldn't effect browser content scrolling, should it?
The temporary blanking is a known issue and should be mostly resolved by bug 1262807 which will be in 48.0 beta 4. Bug 1280656 will help as well. The permanent blanking however is something we should investigate. Do you have specific URLs on which you see the permanent blanking?