This FreshRSS extension sends added feeds through RSS-Bridge, generating RSS and Atom feeds for websites that don't have one. This allows FreshRSS to instantly support hundreds of new sites, e.g. Facebook and Twitter.
To use it, upload this entire directory to the FreshRSS ./extensions directory on your server and enable it on the extension panel in FreshRSS.
rss_bridge_url: the URL for an RSS-Bridge instance e.g.https://example.com/rss-bridge/
Detection only works for bridges that are whitelisted in RSS-Bridge. The detectParameters function inside a bridge is what allows URLs to be detected; not all bridges support this. Website changes will sometimes break bridges, so make sure you're running the most recent version of RSS-Bridge and open an issue if you're still having problems.
It's recommended that you selfhost RSS-Bridge so can enable all the bridges you want to use and ensure all bridges are up to date.
If you don't want to selfhost, here are some publically available instances.