Why Firefox is Not Scoring 100 In The Acid3 Test
Have you ever asked yourself why the Firefox web browser is not scoring a perfect score in the Acid3 test? The test checks a web browser's compliance with web standards. Developed in 2007 and first released in 2008, the Acid3 test has become a standard in testing new web browser versions.
When you run the test in various web browsers, you will notice that both Google Chrome and the Opera web browser score a perfect 100/100 score in the test, while the Firefox web browser seems to be stuck with a score of 97/100 for some time now. Microsoft's Internet Explorer scores 95/100.
Many Internet users argue now that Firefox is less web standards compliant than Opera and Chrome. That's true if you only look at the test results of the Acid3 test, and not beyond.
Mozilla engineer Boris Zbarsky some time ago commented on the missing three points. He mentioned that they test the SVG Fonts support of the web browser which Mozilla does not support because "it gives no benefits to authors or users over the existing downloadable font support".
Robert O'Callahan has this to add:
SVG Fonts --- at least the subset implemented in Opera and Webkit --- don't offer anything significant over downloadable Opentype (or WOFF) fonts ... except the last three points of the Acid3 test :-(. And people keep asking for it "because it's in SVG 1.1". But I don't think those are good enough reasons on their own to make SVG Fonts an essential part of the Web platform.
Mozilla's main motivation not to add support for SVG Fonts, and subsequently fall three points short in the Acid3 test are the better alternatives that they have added to the web browser instead.
Microsoft is actually also not supporting SVG Fonts which explains 3 of the 5 missing points in the browser's Acid3 test.
Alex Limi finally, Firefox UX Lead at Mozilla points out that "he woff font standard is more appropriate, works in more browsers, and is a better way to handle custom font support in browsers". He continues by saying that the Acid3 standard was useful at the time it was first published but not anymore, considering that all major browsers support the majority of features.Advertisement