Simon Willison’s Weblog

5 items tagged “acid3”


Ladybird: A new cross-platform browser project (via) Conventional wisdom is that building a new browser engine from scratch is impossible without enormous capital outlay and many people working together for many years. Andreas Kling has been disproving that for a while now with his SerenityOS from-scratch operating system project, which includes a brand new browser implemented in C++. Now Andreas is announcing his plans to extract that browser as Ladybird and make it run across multiple platforms. Andreas is a former WebKit engineer (at Nokia and then Apple) and really knows his stuff: Ladybird already passes the Acid3 test! # 12th September 2022, 7:34 pm


A browser sniffing warning: The trouble with Acid3 and TinyMCE. Opera recommend “bug detection”, a step up from object detection and browser sniffing where your JavaScript includes mini unit test style fragments of code designed to test if buggy behaviour you are working around still affects the user’s browser. # 4th July 2008, 8:24 am

Ian’s Acid 3, unlike its predecessors, is not about establishing a baseline of useful web capabilities. It’s quite explicitly about making browser developers jump—Ian specifically sought out tests that were broken in WebKit, Opera, and Gecko, perhaps out of a twisted attempt at fairness. But the Acid tests shouldn’t be fair to browsers, they should be fair to the web; they should be based on how good the web will be as a platform if all browsers conform, not about how far any given browser has to stretch to get there.

Mike Shaver # 27th March 2008, 1:35 pm

Opera and the Acid3 Test. Screenshot shows 100/100 (live code or it didn’t happen!)—Opera’s codebase must be in extremely good shape to fix so many issues so quickly. # 26th March 2008, 10:47 pm

Acid3 is out. The third Acid test, again compiled by Ian Hickson. This one viciously tests DOM Scripting standards compliance and currently exposes flaws in every browser. # 5th March 2008, 12:34 am