Honestly haven't tried. Facebook's services are generally pretty rock solid in terms of security though, and any efforts of reverse engineering (e.g. Messenger) I've found seem to get abandoned due to the effort required.
You'd probably be best sticking with web page scraping via something like Puppeteer, but even that'd be difficult.
You'd probably be best sticking with web page scraping via something like Puppeteer, but even that'd be difficult.