@font-face browser support

From Webfonts.info

Webkit/Safari

• since version 3.1
  
• font formats:
  • TrueType/OpenType TT (.ttf)
  • OpenType PS (.otf)
• More info: http://webkit.org/blog/124/downloadable-fonts/
• Wiki: Code samples

Opera

• since
  
  Opera 10: http://www.opera.com/browser/ and Opera Mobile 9.7
• font formats:
  • TrueType/OpenType TT (.ttf)
  • OpenType PS (.otf)
  • SVG (.svg)
• More info: http://dev.opera.com/articles/view/seven-web-fonts-showcases/

Internet Explorer

• since IE 4
  
• font formats:
  • Embedded OpenType (EOT) created by Microsoft's WEFT tool
• More info: http://www.microsoft.com/typography/web/embedding/default.aspx
• Wiki: Code samples

Mozilla/Firefox

• since Firefox 3.5
  
• font formats
  • TrueType/OpenType TT (.ttf)
  • OpenType PS (.otf)
  • WOFF (since Firefox 3.6)
• Wiki: Code samples

Google Chrome

• In Chrome 4.0 stable release. As of January 25th, 2010
• In Chrome 3.0, you could run the executable with a command line switch of: --enable-remote-fonts [1]
• It was disabled by default for security review: [2] [3], [4]
• But it's enabled by default as of version: 4.0.249.4. Which was the beta channel.
• More details on chrome and @font-face here

Netscape

• since version 4, discontinued since Netscape Navigator 6
  
• font formats:
  • Portable Font Resource (.pfr)
• more info: http://en.wikipedia.org/wiki/TrueDoc