Websites That Don't Work in Any Browser Other Than Internet Explorer

Creating a website that only works in Internet Explorer is a very bad business decision. More and more people are switching to other Web browsers like Chrome and Firefox. And if you insist on creating pages that only work in IE, you're deliberately limiting your market share.

deliberately
わざと、故意に、意図的に

He deliberately ignored the error.
彼は、その間違いをわざと無視しました。

I deliberately planned some of my child-rearing techniques.
自分の子育てについて、いくつかの方法を慎重に計画しました。