[Oceander]

Nope. It's another add-on called Modify Headers - nice, short, and to the point, if I do say so. According to the developer, it should be FF4 friendly.

[LibWhacker]

Oh, fantastic, thanks for that! I’m going to install it right away.

[LibWhacker]

Okay, I've installed it and read through all the instructions. But I'll be darned if I can figure out how to get it not to pass information about my fonts. Or about the install dates for my addons, e.g.

I did successfully work through the example the author gave and blocked headers related to the iPhone, which I do not own, lol.

Also, I wonder if a person blocks font information, will his online banking be screwed up from then on, for example, because servers will just send out some ugly default font from the old days, like 12-point Courier that'll totally screw up tables, etc?