The Brazil international scored 30 times in all competitions last season to help Liverpool FC finish in fourth place in the table and end up as runners up in the Champions League.
Firmino, though, has been unable to maintain his form in the current campaign following an exhausting World Cup campaign with Brazil in Russia during the summer.
The 27-year-old has scored three goals and has made two assists in 14 games in the Premier League this term.
Firmino failed to get on the score sheet in Sunday’s Merseyside derby and Jurgen Klopp opted to replace the Brazilian with Divock Origi at Anfield.
The Belgium international netted a dramatic winner in the fifth minute of added time following Origi’s close-range header.
Former Liverpool FC captain Redknapp believes Firmino will manage to rediscover his top form.
“I watched them at times last year when they were breathtaking here [at Anfield], especially with their front three,” Redknapp told Sky Sports.
“Firmino is having a difficult moment, you can’t deny that.
“He is a fantastic talent and he will come through it but at the moment, the way that he plays and with what he did last year, it was so important and earlier this season too.
“The balance of Mohamed Salah playing up front – he’s so good he can play anywhere – but for me, when I watched Liverpool at their best last season, the three when Salah was wide just seemed to work better.”
Liverpool FC finished in fourth place in the Premier League table in successive seasons under the former Borussia Dortmund head coach.
The Merseyside outfit are two points adrift of leaders Manchester City as Klopp’s side look to win the Premier League title for the first time.
Klopp’s side are five points ahead of third-placed Chelsea FC in the race to secure a Champions League spot.
Liverpool FC will make the short trip to Burnley on Wednesday night before the Reds travel to Bournemouth next weekend.
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