

I only have two; uBlock Origin and Firefox Multi-Account Containers.
Those are the only two I use all the time (I like to keep things clean and simple and avoid fingerprinting, there are others that I might enable for a specific task), and I consider them essential enough that they ought to be built into the browser.
What I do is have cookies set to delete by default on closing the browser, with a managed list of exceptions of sites I want to preserve.