Rival bosses Jack Ross and Paul Hartley had their say after Falkirk's late win through Ryan Blair's strike.
And while disappointed at the result Jack Ross was pleased with his players.
He admitted: "Naturally disappointed in the result but not in the performance especially after so many changes.
LEAGUE TABLE: SPFL Championship
"After the last defeat to Falkirk I was irritated in the manner of the game but not here. I was pleased with the performance though I don't like losing games, remember we have won this league by 12 points and that's more than Hibs won it with last year and they're a really good team, so nothing takes away from what this team has achieved."
TEAM STATS: Falkirk FC
Paul Hartley was also pleased with the send-off for Alex Smith.
"It was a good day for him, from both sets of fans and he's done a lot for both clubs.
MATCH REPORT: Falkirk 1 St Mirren 0
"So it was good to send him off with a good victory for us and we wish him well in Australia."