Salah's strike brought his tally for the season to 32 goals but Klopp was keen to point out the contribution of the whole team.
Salah put Liverpool ahead just before half-time with his 24th league goal of the season before Sadio Mane added a second 10 minutes into the second half.
Manchester United will start next Saturday's game at home to the Merseysiders back in second place if they win at Crystal Palace on Monday.
"I think everything we are doing, the way we play, the way we give him the opportunity constantly to play, he deserves that".
"There were two wonderful goals, a few more possible, one world-class save [from Mohamed Diame's drive] but not much more for [Loris] Karius to do".
Firmino then went to Liverpool for a 29-million-dollar transfer in the summer of 2015 and since being under Jurgen Klopp has been an incredible performer, outperforming Phillipe Coutinho.
It was their 17th game unbeaten in all competitions and briefly moved them ahead of Liverpool. "We feel comfortable at Wembley, we know how we play here".
"They all have absolute contracts so it is not that we have a big rush and we have to do it tomorrow but we are in constant talks".
South Korea midfielder Ki Sung-Yueng drove a 20-yarder past West Ham goalkeeper Adrian in the eighth minute for only his second goal of the season. It was like scoring, to be honest.
"For a goalkeeper, timing is very important". I couldn't assess it, it was that poor. "We were fine for 40 minutes and tried to control them but needed to create more on the counter-attack", explained Benitez.
Victory continued Swansea's improved form under Portuguese manager Carlos Carvalhal.
It was the flawless warm-up for Tottenham's Champions League last-16 second leg against Juventus on Wednesday, with the tie delicately poised at 2-2.
Albion have now won one of 15 league games since Pardew took over at the start of December and are seven points adrift at the bottom of the table.
"I really love this player", the Liverpool manager said of the Egyptian at his postgame news conference.
"It is tough but it isn't about me, it's about West Brom and it is tough for the fans and the players".
Stoke picked up a point, but remain in the bottom three, following a goalless draw at Southampton, who drop to 17th.
Cenk Tosun headed his first Everton goal before Ashley Barnes equalised for Burnley.
The Clarets, though, produced a second-half recovery to mark Sean Dyche's 250th game in charge with a hard-earned win.
Everton defender Ashley Williams was sent off in the 86th minute after swinging his arm into Barnes' face.