I think this is what the Temporary Containers extension does? For me, it's a fundamental part of my browsing at this point, what I install immediately after installing an adblocker.

I feel resentful that the Temporary Containers extension isn't available on mobile Firefox. To me it would be as if adblocking extensions wouldn't be available. It's one thing of many that seems really different about mobile Firefox, to a point where the cynical part of me feels like mobile Firefox is being obsequious to advertisers or something for some reason in a way desktop is not.

would pay for this feature, does anyone know of another extension that does this to be used in conjunction?