No, it is not safe to use a microwave to dry out wet firecrackers, especially after they have been lit. Microwaves are designed for heating food and are not suitable for drying or igniting firecrackers.
Attempting to dry out wet firecrackers in a microwave can be extremely dangerous. Firecrackers contain explosive materials and can ignite or explode when exposed to heat or flames. Placing them in a microwave could cause them to detonate, leading to a serious safety hazard, including the risk of injury, fire, or property damage.
If you encounter wet firecrackers or fireworks, it is best to handle them with care and dispose of them properly. Do not attempt to dry them using any heat source, including a microwave. Instead, it is recommended to contact your local authorities or a professional hazardous waste disposal service for guidance on safe disposal procedures.