Stand-in captain Georgia Redmayne led from the front to finish within a whisker of her second century of the WNCL this summer, while teenage prospect Charli Knott produced a mature maiden WNCL half century as the Fire chased down NSW's total to claim an impressive eight-wicket win.
Redmayne's 99 not out was brought up with a six for the winning runs, as she and the powerful Laura Kimmince (45 off 37 balls) iced a compelling run chase.
The Fire managed to rein in the Breakers in their batting innings, keeping the home side to 7-236 from their 48 overs after play was delayed due to rain.
Pace bowlers Georgia Prestwidge (1-47) and Meagan Dixon (0-38 from 10 overs) performed soundly, while debutant spinner Lilly Mills (1-28) claimed her first wicket in her maiden game.
Although not called upon with the bat, allrounder Grace Harris proved a handful with the ball, derailing the Breakers when they looked set to push onto a big score. She finished with 3-39 from nine overs
Knott was calm and measured, as she and Redmayne built the innings after the early loss of Georgia Voll.
The 18-year-old allrounder picked up the pace as she neared 50, and demonstrated an array of sweetly timed drives and deflections as she scored 68 from 94 deliveries.
Redmayne was again classy, with her unbeaten near hundred taking her season tally to 397 runs at 99.25.
The Fire will now keep an anxious eye on the weather as they rally for their final push on Sunday against NSW at North Sydney Oval, with weather again expected to play a role in the outcome.
Queensland is in second spot but can still be toppled out of the Final with a NSW win and a South Australian victory over the ACT on Sunday pushing the Scorpions intro the decider against top-placed Victoria.