IIRC ghostery tracks you.

I use NoScript and RequestPolicy (for the moment incompatible with latest version of FF).

i've heard the same thing too, but sometimes ghostery shows stuff noscript doesn't so i use both "just to be safe" but i guess i shouldn't use ghostery?

Only if you opt-in to it.

Probably by viewing the source code and seeing Google analytics stuff.

It does for me. Maybe it's a default setting for you? Anyway, uBlock does show it.

hmmm ublock for me (on opera) doesn't block the frame where the ad is so I see an area on the page with "cannot be displayed" so for me it looked like adblock plus is still the better option; is there one area where ublock better than adblock?

ublock shows it clearly. Ghostery seems to whitelist GA these days?