when trying to auto update the Smush Pro, browser crushed.

When I tried to update the Smush Pro, my browser (Firefox the newest version) went crushed. and need sometime to be able to view the frontpage too.
But, when I view from my iPhone, it seems has no problem.
What exactly is the problem, do you think?

How could I update the Smush Pro? and Why this plugin update so often?

Regards,
Kay