From my previous experience, I don't know the actually use of this addon and it really slowdown my browser.

Ce module ralentit les ouvertures de certaines pages

Although excellent in concept, if you delete cookies at the end of your browsing session, Ghostery loses record of *all* the tracking you want to block. Which I describe as a fatal flaw, because cookie removal is one of the basic things that you would expect a privacy-conscious user to do.

Seems like a bizarre thing for the devs to miss. I mean, who else would use Ghostery?

Otherwise, if you don't clear your cookies, Ghostery is an excellent tool that seems to do everything it promises, quickly and tidily.

It's not terrible, but it's not as good as it was when I first started using it. There are now better tracker-blocker extensions out there.