Google slows down Firefox users when watching YouTube....

https://lemmy.ml/post/8239003

Google slows down Firefox users when watching YouTube.... - Lemmy

Google slows down Firefox users when watching YouTube…

Use Piped or Invidious, it also bypasses ads and tracking. It works best in combination with LibRedirect, which you can configure to automatically redirect all YouTube links to Piped or Invidious.
Piped

An alternative privacy-friendly YouTube frontend which is efficient by design.

Any difference between Piped and NewPipe?
NewPipe is an Android app that allows you to watch YouTube videos without ads or tracking. It exposes your IP to Google servers though. Piped consists of a web client and a backend server, it uses the NewPipeExtractor on the server to load the video as well as all the metadata from Google servers and then serves it to you through the web client. That way, you don’t have to connect to Google, only the Piped server communicates with YouTube servers.