On: 80% of my traffic is excluded from Google Analytics

[exciteabletom]

Also worth noting that recent versions of Firefox block GA by default

[SquareWheel → exciteabletom]

It seems to allow it here. Fully up-to-date, default settings.

[exciteabletom → SquareWheel]

I should clarify it isn't blocked in the traditional sense.

It loads a benign script that pretends to be GA but doesn't touch Google servers at all, to avoid breaking sites that expect GA to be available.