Looking to rip videos from anime streaming sites.

I use Librewolf, alternatively, Floorp, so I wonder if there's anything I can use on them to download videos with.

And I plan on using them on sites similar to hianime, but I'm tired of like, finding one stream and it dies, then having to go find another .etc

I want to save my favorite series so I can have something to watch reliably than something that is operating on uncertainty.