Umberger scored twice, Biron made 34 saves and Philadelphia beat the Montreal Canadiens 4-2 on Saturday night to even the second-round series at a game apiece.
"Marty was a huge part of that," Carter said. "He was unreal tonight, again, and made the big saves when we needed them. It's a good win for us. As a team on the road, going for home ice advantage is your main focus."
Umberger opened the scoring 5:53 in with his third goal of the playoffs.
After Markov scored 1:26 into the third to draw Montreal to 3-2, Umberger sealed the win with his second goal of the game with 2:21 remaining, shooting into a wide open right side after he batted the puck out of Price's glove.
"I was just crashing the net and it went in," Umberger said. "I'll take it."
For his part, Price wasn't happy about Umberger's tactic.
"It was a little bit of interference but it was a little bit of a hockey play, too," Price said. "I was going for the puck and he gives my glove a whack and I don't get the puck and he gets it."
Game 3 is Monday night in Philadelphia.
Briere, booed throughout the first two games at the Bell Centre, got his seventh goal of the playoffs 13:33 into the second to restore the Flyers' two-goal lead after Koivu scored on a power play late in the first.
Briere cut across the goalmouth and put a backhand under Price's pad and off the left post and over the goal line. Briere has been a constant target of Canadiens fans through Philadelphia's four games in Montreal this season -- including two regular- season games -- after he passed up the Canadiens' offer to sign as a free agent with the Flyers.
"We let them back in the game a little bit but I liked the way we didn't just sit back this time when they tried to come back in the game," Briere said. "We attacked and found a way to get that two-goal lead again."
Price was beaten on shots over his left shoulder twice in the first half of the opening period as Umberger and Carter scored goals 2:46 apart to give Philadelphia a 2-0 lead 8:39 in.
Umberger took a drop pass from Jim Dowd in the right corner and used Koivu as a screen when he put a wrist shot over Price's shoulder into the top right corner of the net for his third goal.
Carter made it 2-0 with his fourth goal, a power-play effort at 8:39 as he beat Price with a shot from the right side.
"The first one I didn't get a good peek at it and the second one, Carter made a good shot," Price said. "I think he only had a puck-sized part of the net there and he hit it."
Koivu scored a power-play goal at 16:18 to cut the lead to 2-1 shortly after the Canadiens enjoyed a lengthy two-man advantage.
The Montreal captain reached around from behind the net to tuck the puck inside the right post, setting off a wild celebration by the crowd of 21,273.