How do I check if a website is intentionally blocking FDM to prevent downloads?

Try downloading the same file using a regular web browser without FDM. If the download works in the browser but fails with FDM, the website might be blocking FDM specifically. You can also check the website's robots.txt file to see if it disallows user-agents that identify as download managers. Analyzing the HTTP headers exchanged between the browser and the server might reveal specific blocking rules.