While "Facebook Desktop Login" isn't a standalone product with a traditional consumer review,
Browser Cache: If the page fails to load or the login button isn't working, try clearing your browser's cache and cookies or updating your browser. How To Fix Unable To Login To Facebook - Full Guide facebook desktop login
The Future of the Gate: Passwordless and the Portal’s Twilight While "Facebook Desktop Login" isn't a standalone product
If you find yourself stuck in a login loop or facing a blank screen, try these common fixes: try these common fixes: