Update Mozilla sponsorship

Author: ericholscher

docs/sponsors.rst

@@ -9,8 +9,9 @@ supporting us.
 Current sponsors
 ----------------
 
-* `Rackspace`_ - They cover all of our hosting expenses every month.  This is a pretty large sum of money, and we are really grateful to have them as a sponsor.
-* You? (Email us at [email protected] for more info)
+* `Rackspace`_ - They cover all of our hosting expenses every month.  This is a pretty large sum of money, averaging around $3,000/mo, and we are really grateful to have them as a sponsor.
+* `Mozilla`_ - Mozilla has given us a `MOSS grant`_ for building specific features, and have funded Eric Holscher to work on Read the Docs at $1,000/mo for 2016.
+* You? (Email us at [email protected] for more info)
 
 Past sponsors
 -------------
@@ -22,12 +23,14 @@ Past sponsors
 * `Lab305`_
 * `Twilio`_
 
+.. _MOSS grant: https://blog.readthedocs.com/rtd-awarded-mozilla-open-source-support-grant/
 .. _Revsys: http://www.revsys.com/
 .. _Python Software Foundation: http://python.org/psf/
 .. _Mozilla Web Dev: http://blog.mozilla.com/webdev/
 .. _Django Software Foundation: https://www.djangoproject.com/foundation/
 .. _Lab305: http://www.lab305.com/
 .. _Rackspace: http://www.rackspace.com/
+.. _Mozilla: https://www.mozilla.org/en-US/
 
 .. _Twilio: http://twilio.com/
 .. _Signal: http://signal.twilio.com/