The Reds increased their advantage at the top of the Premier League to 25 points with a hard-fought success at Carrow Road.
Mane was the match-winner on his return from injury, the Senegalese forward making full use of an assist from Henderson on 78 minutes to decide the contest.
Having brought the ball under his control at a height, he adeptly shifted his body to plant an unstoppable left-footed finish between the near post and the goalkeeper’s reach.
“It was a fantastic run from Sadio, great touch and a great finish – fantastic goal from him,” Henderson told Liverpoolfc.