“Firefox can block ads, so we’re blocking anyone using Firefox from seeing our pages at all.” Priceless. Nevermind the fact that the User Agent Switcher extension means that Firefox can appear to be any other browser, easily bypassing this kind of block. I can understand why people would want to do this, but they’ll need to come up with something a lot better than that if they want to force-feed people ads.

(I don’t use the ad-blocking extension. I’ve never had a need for it, because I don’t care about text ads, or still-picture ads; the only type I can’t stand is the animated ad, which the Flashblock extension mostly takes care of.)