User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:44.0) Gecko/20100101 Firefox/44.0 Build ID: 20150923030230 Steps to reproduce: 1. Load https://github.com/bramstein/fontloader/blob/master/Gruntfile.js (note how the font the code is printed with looks like) 2. Scroll the page with a touchpad (note how the code font looks like after that) Application Basics ------------------ Name: Firefox Version: 44.0a1 Build ID: 20150923030230 Update Channel: nightly User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:44.0) Gecko/20100101 Firefox/44.0 Multiprocess Windows: 1/1 (default: true) Safe Mode: false Graphics -------- Asynchronous Pan/Zoom: wheel input enabled Device ID: 0x0a26 GPU Accelerated Windows: 1/1 OpenGL (OMTC) Supports Hardware H264 Decoding: No; Vendor ID: 0x8086 WebGL Renderer: Intel Inc. -- Intel HD Graphics 5000 OpenGL Engine windowLayerManagerRemote: true AzureCanvasBackend: skia AzureContentBackend: quartz AzureFallbackCanvasBackend: none AzureSkiaAccelerated: 0 Actual results: After touchpad scrolling the font looses its smoothness. This only seems to happen with monospace font and only when scrolling is done with a touchpad (if you scroll the page with a down arrow keyboard key the font stays the same). Expected results: The font retains its smoothness after scrolling.