Netscape only tags only work in Netscape, Mozilla, Firefox or related browsers. They don't work in Internet Explorer.
- <blink></blink> Netscape and Mozilla
- <keygen /> Netscape, Mozilla, Safari, and Opera
- <layer></layer> Netscape 4 and lower
By Jennifer Kyrnin, About.com Guide
Netscape only tags only work in Netscape, Mozilla, Firefox or related browsers. They don't work in Internet Explorer.