Many file-hosting websites support a feature called "Click'n'Load."
The exact steps may vary based on the version of JDownloader and the operating system you're using. Always refer to the official JDownloader documentation for the most up-to-date information. how to make jdownloader default downloader
For deeper integration, look for browser extensions or plugins that specifically enable better integration with JDownloader. through about:config in Firefox)
If you download .dlc container files or want JDownloader to open specific archive types, you must set the file association in your Operating System. how to make jdownloader default downloader
If your browser supports changing the default download handler (e.g., through about:config in Firefox), look for a preference that allows you to set JDownloader.