Welcome Gina and Diva! I can't wait to see some pictures of your girl!
Frenchies are very playful and it sounds like she is both smart and playful. Could you temporarily cover your furniture with old blankets so when she starts scratching and chewing you can just tell her no, give her something acceptable to chew on, and not chase her? She knows how to get you to play her game! Another thought would be to put her in a time out in her crate when she starts chewing on the furniture.