Prosecutors in San Francisco and Los Angeles are suing a disability rights law firm they say has filed thousands of fraudulent lawsuits against small businesses across California.

Announced Monday, the complaint seeks restitution, civil penalties and injunctions against San Diego-based Potter Handy, also known as the Center for Disability Rights, for years of litigation prosecutors say basically amounted to shakedowns of small businesses through serial plaintiffs with no regard to actual violations of the American Disabilities Act.