Firsts - 2013 First Embarrassing Moment 2-6 was released on:
USA: 1 March 2014
Firsts - 2013 First I Do 2-10 was released on: USA: 1 March 2014
Firsts - 2013 First STD 2-4 was released on: USA: 1 March 2014
Firsts - 2013 First Goodbye 1-4 was released on: USA: 31 October 2013
Firsts - 2013 First Proposal 2-9 was released on: USA: 1 March 2014
Firsts - 2013 First Therapy Session 1-5 was released on: USA: 31 October 2013
Firsts - 2013 First Double Date 2-7 was released on: USA: 1 March 2014
Firsts - 2013 First Game Night 1-9 was released on: USA: 31 October 2013
Firsts - 2013 First Sick Day 1-10 was released on: USA: 31 October 2013
When he fell on stage for the first time in front of 22000 fans
Firsts - 2013 First Meet His Best Friend 2-2 was released on: USA: 1 March 2014
It can be, like in the following sentence. There were many firsts in this historic week.
The plural of the noun "first" (an inaugural or premier accomplishment) is firsts.E.g. "The Soviet Union was responsible for many firsts in space exploration."