Using this extension it's possible to acquire the necessary data for the desktop application of Manga Downloader to bypass the Cloudflare o similar anti-bot protections. Thanks to this you will be able to download again manga even from those websites with an anti-bot protection enabled. 
Note: the method used by this extension is compatible only with Manga Downloader v50 (or higher). Please visit https://redsquirrel87.com/mda for more detailed info and instructions.