We all know that both Opera and Safari's WebKit achieve nearly 100% on Acid3 test, and Mozilla's Firefox did not score well.
Response from Mozilla on not achieving well in Acid 3 test? Calling Acid3 test being biased, favouring WebKit and Opera. From your beloved open-source Mozilla co-founder
Mike Shaver and Mozilla developer
Rob Sayre, they bashed Acid3 instead.
It is worth noting that back in 2006, when IE did not pass Acid2, Microsoft's All Billing said:
We’ve written about the Acid2 test before. It is not a compliance test but is, instead, a wish list. We’ve been clear that we were not going to pass this test since we were first asked about this. The author of the test is well aware of this.
(Please note that there was no bashing tones from Microsoft's response.)
Then in 2007 when IE8 (standard mode) passed Acid2, it was referred as a milestone.
Had Firefox passed the Acid3 test or being the first browser to pass Acid3 test, we could have expected unnecessary bragging about it.
More detail at
Mozilla blasts Acid3 as Safari and Opera grab the brass ring (ZDNet.com) Worth reading!
UserAgent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13