Earlier quoted context omitted.
These extensions are killer, and are the primary reason I use Firefox. No other browsers have similar functionality at all that I've found. For me, it's the best setup I've found in terms of cookie/session management. By default, I do want every new tab I open to come with a clean slate of no cookies, local storage, SQLite, or whatever other storage/tracking mechanisms are invented. If I need to open up a Google serv…
The key insight for me was that persistence should be opt-in—when I want a website to remember me, I take action to express that—the opposite of the current norm. I sometimes wonder whether Google was strategically preempting this paradigm when they mainstreamed ephemeral sessions under the framing of sneaky mode.
If you don't want cookies, you can turn them off for all sites (with exceptions) or for some sites.