This is on my mother's Win7 64 machine. In Firefox 34 and 35, when you click on a photo on Facebook it sits below its proper area. It persists at full screen too.
Chrome is fine.
And no, this is my mother we're talking about - she's too used to Firefox to use Chrome.
Any idea how to fix? I've tried turning off extensions, changing themes, and I'm kind of at a loss. My Googling powers are failing me. It seems like this is the way Firefox chooses to render Facebook code but I know of no other Firefox users having this problem (including me).
Examples:
20150128_220247b.jpg
20150128_220306b.jpg