If you cannot display this site properly, please download FireFox.

While searching for information about selling inflatable beds online, I came across a manufacturer's official website that prominently displayed the message: "If you cannot display this site properly, please download FireFox." [Note: It’s just an official website of a bed manufacturer.] This piqued my curiosity: Are there really specialized websites that aren't very compatible with IE? So, I clicked on the link and found the following explanation (it seems Firefox is truly in its prime lately):

Can't display the page properly??!!

If you use Ma*thon...

If you use IE modified by Ma*thon...

If you are still using an operating system or browser that does not support XML...

Then the problem of pages not displaying properly when you visit our site can be solved by...

...downloading FireFox to resolve all issues once and for all.

...

In their view, you might wonder just how much better FIREFOX is than IE. You should take a look, especially if you're planning to buy an airbed today like I am.