For many years, I used "ask me every time" until I just couldn't take it any more... One of the problems with being prompted is that the dialogs can be generated before you even respond to the first one. I think that's why you're finding this feature not to be so effective. I don't know whether there's a workaround for that. It might help to turn off automatic loading of images (typically, every item served from the server comes with cookies, so this should at least reduce the initial onslaught) but that is inconvenient in a different and possibly worse way. Eventually I concluded that it isn't worth it. I set Firefox to accept all cookies until I close Firefox. If I want a site to remember me so I stay logged in, I manually add an exception for the site. I had accumulated a lot of blocks for ad servers, and I didn't remove those. This approach allows some tracking during my browsing session, but as far as those sites know, I'm a new person again the next time I start Firefox. Sanity preserved.