I was a renter home caught fire cause microwave can i sue microwave company for loss of personal property and do land lord return our deposit

You can certainly try to bring a case against the microwave company for the damages.  they may claim that it was faulty wiring that caused a power surge, or that you put something in the mircowave that was not able to go into the microwave, or some other defense to them paying damages.  If you caused a fire - even if it was because of the microwave, the landlord does not have to return your deposit.