Created attachment 8671521 [details] Screenshot of broken 'g' Loading: http://www.hollywoodreporter.com/live-feed/jane-virgin-telenovela-passions-santos-830355 on Windows, I see output like in the attachment. On OSX, it works fine. When I remove the italics with the devtools inspector, it also works fine. In case it's relevant, on Windows I see no font name in the devtools "Fonts" set when I inspect the <em> element, but on OS X the font is labeled Roboto Italic Webfont, and seems to work. In both of these cases I'm testing beta, though I just checked and today's nightly on my Windows machine shows the same problem. Here's my graphics config on the Windows nightly: Adapter Description NVIDIA Quadro 600 Adapter Drivers nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um Adapter RAM 1024 Asynchronous Pan/Zoom none Device ID 0x0df8 Direct2D Enabled true DirectWrite Enabled true (6.3.9600.17999) Driver Date 8-29-2013 Driver Version 188.8.131.5202 GPU #2 Active false GPU Accelerated Windows 1/1 Direct3D 11 (OMTC) Subsys ID 083510de Supports Hardware H264 Decoding Yes Vendor ID 0x10de WebGL Renderer Google Inc. -- ANGLE (NVIDIA Quadro 600 Direct3D11 vs_5_0 ps_5_0) windowLayerManagerRemote true AzureCanvasBackend direct2d 1.1 AzureContentBackend direct2d 1.1 AzureFallbackCanvasBackend cairo AzureSkiaAccelerated 0 (this is a standard issue MoCo machine that's about 2.5 years old now - in the past, whenever I tried to update the graphics drivers, it would somehow not work and prompt me to update again after the next startup, so I'm not sure that's an option - though the above looks pretty happy to me as an amateur, apart from the obvious age of the driver itself...)
I see the same bad rendering in Chrome and IE11 on my Win8.1 machine, suggesting this is not a Firefox issue but a problem with the font and/or Windows rasterizer. Given that the problem seems to persist even at large zoom levels, and regardless of the font smoothing setting I try, I'd guess it indicates bad hinting in the font. OS X ignores TrueType hints, which would explain why things look fine there.
(In reply to Jonathan Kew (:jfkthame) (PTO until Oct 12) from comment #1) > I see the same bad rendering in Chrome and IE11 on my Win8.1 machine, > suggesting this is not a Firefox issue but a problem with the font and/or > Windows rasterizer. In that case, should this bug report be closed or is this something we can work around?
Nothing we can do, AFAICS; as a gecko core bug, this is invalid. It's possible the site involved is using a modified or obsolete version of the Roboto Italic font (I notice they're serving it locally embedded in their CSS, rather than linking to Google Fonts); if so, they should try updating it and see if that helps. It's also possible the problem exists upstream in the original Roboto font, in which case it's a bug for them.