Received an OTA today, any idea what it is?

I had an OTA update available this morning. It's only 51.3 MB so it can't be anything major. Maybe a stagefright fix? Anyway, I pulled it just in case anyone wants to check it out. I'm already on D80130B. I'm rooted with TWRP. Is there any easy way to install it without losing TWRP?

Here's the link for it: https://www.dropbox.com/s/5ast6zoe51...pdate.zip?dl=0