Feb 27, 2011
In a previous post, Correct MIME Type for CSS Web Fonts, I discussed the lack of official, standards-based MIME types for various web fonts.
In the 18 months since then, the state of MIME types for web fonts largely remains the same:
Because there are no defined MIME types for TrueType, OpenType, and WOFF fonts, the MIME type of the file specified is not considered.
— @font-face, Mozilla Developer Network
However, since then web font support in most major browsers has continued to improve. The lack of official MIME types for web fonts is not a major concern, and it has not slowed further adoption of web fonts in most major web browsers. One emerging font format is WOFF.
In late 2009, Mozilla debuted the Web Open Font Format (WOFF) specification and soon shipped a working implementation in the first WOFF-capable web browser, Firefox 3.6. The Mozilla Foundation was then joined by Microsoft Corporation and Opera Software ASA in April 2010 as they submitted a specification for the WOFF file format to the newly chartered W3C WebFonts Working Group.
Microsoft debuted support for WOFF in Internet Explorer 9 platform preview 3. Opera added support for WOFF in Opera 11.10. Google Chrome 5.0 added support for WOFF. Curiously still absent among the major web browsers supporting WOFF today is Apple Safari.