"[7] The following year she represented Northern Ireland in the 2014 Commonwealth Games, competing in seven events against non-disabled athletes.

[9] Firth failed to compete in the World Championships after suffering a fractured wrist in training just a few days before the competition.

[10] On 26 April 2016, in the qualifiers for the 2016 Summer Paralympics in Rio, Firth set a new world record in the S14 200 metres freestyle.

[11] On 8 September 2016, Firth defended the title that she had won in 2012 in the S14 100m backstroke, for the 2016 Summer Paralympics at Rio de Janeiro.

[15] At the 2020 Tokyo Paralympics, Firth defended her title in the 100m backstroke S14[16] and also won gold in the mixed 4 x 100m freestyle relay S14.