"Our forwards were great. We knew they were coming with a big, physical pack and we got caught on the edge a couple of times in defence," said Earls.
"The last couple of weeks we have been winning without playing well, but we scored some good tries today. But there is still another 30% in us at the moment.
"It's going to be a massive task for us next week, but we got a good result down there a few years ago and that should give us some confidence."
Earls was among four players who figured in the win at Thomond Park who were in the side that triumphed 37-14 at Stade Aimee Giral in the 2009/10 season. Munster won by a point at home and then picked up a precious bonus point on the road the net weekend as they worked their way through to the semi-finals.