: Message deletion is permanent. Once the extension finishes the process, messages cannot usually be recovered.
: Reputable extensions like those from Sam Hoque claim 100% local processing, meaning they do not send your message data to external servers. Download Delete Bulk Facebook Messages extension zip
Because these tools require permission to read and change data on Facebook, caution is essential: : Message deletion is permanent
: Open Chrome and navigate to chrome://extensions/ . Download Delete Bulk Facebook Messages extension zip