Could be leaking through the heater air intake under the cowl, under the wiper motor area, then it leaks out of the heaters blower box onto the floor.
If its leaking around the glass, youre better off removing it and starting over. Best to use a hot knife to cut the urethane seal.
Here is a pic of what your hvac air intake looks like, this may not be exact but very simular if not the same.
Hope that helps