In Sunday's 5-1 triumph at Anfield, the Egyptian scored the Reds' fourth goal. After celebrating, he took a staff member's phone and took a picture of himself and the Liverpool supporters behind him.
However, given that one of Liverpool's sponsors makes the phone Salah used, others have questioned whether it was a marketing ploy.
Salah told BBC Sport, "I always take selfies with players [who score] at the start of the season, so for this one I said 'OK, I have to think of something special because it's a picture that's going to be there forever.'"
Salah, 32, has shared pictures with Reds teammates on social media on a regular basis. He recently shared a self-taken photo along with the news of his two-year contract extension.
It was a Liverpool employee behind the advertising hoardings in front of the Kop, but at first, onlookers believed Salah had stolen the phone from a fan in the throng.
Salah and Liverpool shared the shot on social media, and it has received millions of views and likes.
However, it has generated some controversy as many question if it was a spontaneous celebration or an advertisement for the club's official partner, Google Pixel.
It was a Liverpool employee behind the advertising hoardings in front of the Kop, but at first, onlookers believed Salah had stolen the phone from a fan in the throng.
Salah and Liverpool shared the shot on social media, and it has received millions of views and likes.
However, it has generated some controversy as many question if it was a spontaneous celebration or an advertisement for the club's official partner, Google Pixel.
Others have responded by saying that they were unaware that Salah would have scored and that none of the first three goal scorers celebrated, even though it was his 33rd goal of the season and hence not very surprising.
This season, a number of Liverpool players have appeared in Google TV and social media advertisements.
Salah took more selfies after the game, which Google Pixel shared on social media.
Referee Thomas Bramall had the option to book Salah for postponing the start of play by celebrating, but he chose to keep his cards in his pocket.
Cody Gakpo, a teammate, had already been given a yellow card after celebrating his goal to make it 3-1 by removing his jersey to reveal a T-shirt that read, "I belong to Jesus."
This season, a number of Liverpool players have appeared in Google TV and social media advertisements.
Salah took more selfies after the game, which Google Pixel shared on social media.
Referee Thomas Bramall had the option to book Salah for postponing the start of play by celebrating, but he chose to keep his cards in his pocket.
Cody Gakpo, a teammate, had already been given a yellow card after celebrating his goal to make it 3-1 by removing his jersey to reveal a T-shirt that read, "I belong to Jesus."
Liverpool and the Football Association (FA) have been contacted by BBC Sport to comment on the Salah selfie story.
Although the FA has regulations regarding kit and betting company advertising, it doesn't seem like there are any explicit rules that forbid this kind of behavior, even if it was deliberate marketing.
Salah is by no means the first football player to use a selfie to celebrate a goal, despite all the attention.
Francesco Totti of Roma, who scored in a 2015 derby against Lazio, was arguably the most well-known to date.
At the age of 38, one of Roma's coaches gave him a phone before he took the team's supporters' picture.
However, many other players have also done it.
Although the FA has regulations regarding kit and betting company advertising, it doesn't seem like there are any explicit rules that forbid this kind of behavior, even if it was deliberate marketing.
Salah is by no means the first football player to use a selfie to celebrate a goal, despite all the attention.
Francesco Totti of Roma, who scored in a 2015 derby against Lazio, was arguably the most well-known to date.
At the age of 38, one of Roma's coaches gave him a phone before he took the team's supporters' picture.
However, many other players have also done it.
Mario Balotelli also gained notoriety for a selfie he took while celebrating his goal with his teammates during Marseille's 2019 victory against Saint-Etienne.