Firefox's implementation of manifest v3 is a bit different than Chrome's, and still allows for blocking webrequests with no upper limit.
https://blog.mozilla.org/addons/2024/03/13/manifest-v3-manifest-v2-march-2024-update/
https://blog.mozilla.org/addons/2022/05/18/manifest-v3-in-firefox-recap-next-steps/
LibreTube is also a good one. Basically an app for piped