Falkirk fans might feel rightly aggrieved by this result, but in a proper scrap it was St Mirren who proved more clinical.
They enjoyed more possession, created a higher expected goals (xG), got into the St Mirren box more, and generally played more eye-catching stuff.
But they missed big chances - Stewart hitting the post, Dylan Tait placing one wide, Filip Lissah taking a big touch in the box.
And although Stewart scored, he also has to get used to the life of a form striker. Five goals in his last four games now, with plenty debating whether he should be part of the senior Scotland squad.
But he was not left alone all afternoon by the St Mirren defence, mainly Freckleton. They pestered him, and fouled him plenty, but instead of feeding the Falkirk striker, it seemed to just frustrate him.
As for the managerless visitors, they tried to change up their direct style that they were famed for under Robinson, but it was almost their undoing.
The Falkirk goal only came from Freckleton's indecision at the back, and they don't look used to trying to play out from defence. Instead, the goals both came from set pieces.
A first win, then, for interim manager Craig McLeish. He claimed through the week that his time in charge has whetted his appetite for the permanent role. This victory will only add to his hunger.