i think it is the left motor mount. is Firestone a reputable repair shop?
LEFT MOTOR MOUNT on 2000 Honda Accord
Firestone is a Franchise and like any Franchise whether it be Firestone or Burger King any business depends on the team of people working at a branch. I have seen the left engine mount fail but I've replaced more front mounts.
I had my own left motor mount and the labor to put it in was $275.