With people relying on Google's office suite more extensively as a result of its Android integration or the inability to use much of anything else on a Chromebook, the company needs to do more to fill in the gaps in the software's functionality. So now the company has rolled out add-ons support for Google Docs and Sheets (the new version). Similar to browser extensions, these tools provide additional features and third-party integration that enhance what the two programs are capable of.
When I visited Mozilla's offices about 6 months ago, I saw a mobile testing station which included about 20-30 different phones lounging around, with their chargers plugged in. I knew something serious was coming soon. There were rumors about Firefox for Mobile for a while but nothing to really show for it.