Bernier has won nine games in a row for the Avalanche, which is the longest by a Colorado goaltender since Patrick Roy won 11 straight from Jan. 12-Feb. 7, 1999, and is tied for the second-longest streak in franchise history (Stephane Fiset, Oct. 18-Nov. 18, 1995).
"Feels really good," said Bernier, who spent three seasons with the Maple Leafs from 2013-16. "It's one of those games where you look on the calendar and you want to play that game and you definitely want to win. I've got to give credit to the guys, we battled hard, stuck with it, and Comeau scored a big goal."
The Avalanche have held opponents to two or fewer goals eight times during the streak.
"We made a couple mistakes but got the save when we needed it tonight," Colorado coach Jared Bednar said. "For the most part, our scoring chances against are slowly coming down over the last couple months. That's where we want to get to, we want to be able to stay dangerous offensively and still do a good job defensively so we're not over relying on our goalies."
Patrick Marleau and Auston Matthews scored, and Frederik Andersen made 23 saves for the Maple Leafs (26-18-5), who are 1-2-3 in their past six games.