Bug 49374 - Web Font specified with base64 data URI ending with EOT is not rendered. Each of the following pairs should look identical. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS successfullyParsed is true TEST COMPLETE PASS document.getElementById('ref0').offsetWidth is document.getElementById('test0').offsetWidth PASS document.getElementById('ref1').offsetWidth is document.getElementById('test1').offsetWidth Proper data URI Proper data URI Data ends with EOT Data ends with EOT