Gawd don't be so touchy! It was a tongue in cheek comment sheesh.. Get another coffee QMBut, with all due respect, that is not really a simple solution for some people. Some folks use it to keep in touch with family and friends or to keep updated on various activities/groups etc.
For those people, would the above extension help?
Anyway yes.
What this does is isolate.
Whereas a technical option would be to suggest; VPN, Proxy, ToR or a browser that will not allow tracking via cookies and JS or HTML embedded elements, which let's face it is a headache, what this does is totally isolate the tab and FB into it's own nursery.
That way no tracking JS or cookies can be used when you leave that tab and move on elsewhere. Therefore becoming untraceable.
So, and this is what you would expect from FF, this is similar to an in tab private browsing session, but totally isolated and without the need to constantly try and open a new in-private session, rather have it by default using the said extension.
Good find.