You should read planet.mozilla.org for a few days to get a feel for what life is like at Mozilla, but doing so isn't very sustainable, because one can only drink from a firehose for so long before they collapse from information overload.

A good sustainable alternative to reading blogs is newsletters, as these are created by folks who spend lots of time consuming the firehose and "gardening" the torrent of content by picking out the most important pieces and summarizing them.

Check out the Newsletters wiki page for a list of them, and subscribe to the ones that interest you. If you only have the bandwidth for a single newsletter, you should subscribe to about:mozilla.