Find in This Page - Firefox

Although it's not an firefox extension, the "Edit/Find in This Page" and the way it works, is just fantastic. Brilliant design IMO and I use it often.
I wonder how many browsers have this one also, because this is a MUST in my browser.

The same function in MSIE6 "Edit/Find (on This Page)" with the pop-up screen is so UNpractical and doesn't even work the way I want. It's a dinosaurus compared with Firefox.
If MSIE7 doesn't have it, I will keep my Firefox as main browser for surfing and searching.