Why the f*** doesn't ff/gecko support css zoom yet?

It has been around since 2000! THAT'S 16 YEARS AGO!! 

It's fairly common to see someone using zoom (hint, because it's incredibly useful) so why has support for this not been added yet?

Internet explorer has supported zoom since IE 5.5 (was released in 2000...).

At the very least we need a -moz-zoom (and no, don't say -moz-transform: scale().. It doesn't do the same thing and shouldn't be used in most cases.

So tell me: WHY THE F*** ISN'T IT SUPPORTED YET?