Ladybird passes the Apple 90% thresholf on web-platform-tests, marking a major milestone
Ladybird, an independent and open source web browser developed from scratch, has now surpassed 90% compliance on the web-platform-tests suite. This achievement was announced by lead developer Andreas Kling on X, and marks a considerable milestone for the cross-platform project.
Crossing the 90% threshold is especially meaningful because Apple cites this level of compliance as a minimum requirement for web browsers to be considered viable alternative engines on iOS, alongside other criteria. While this development brings Ladybird closer to iOS eligibility, users should note that the browser is not yet available as an alternative engine on Apple's mobile operating system. Progress continues, but there remain some functional limitations that need to be addressed before general iOS deployment can be realized.
At the same time, Ladybird's pace of advancement has attracted attention. For a non-corporate, independent project, reaching this stage so quickly is noteworthy within the development community. Ladybird’s adherence to open standards and independent approach highlight its growing relevance in the browser landscape.




Comments
The last Chrome stable version is at 96.8% (more than 97% for the experimental version). Firefox stable is about 95%. Theses tests are important enough to be mandatory for every code change to ensure no regression (with other like a bunch JavaScript performances tests). Funnily, Safari, aka the always-late-at-the-party one, was slightly above 90% in 2020 (certainly when Apple started its iOS compliance rule), and now pretty much like Firefox. Of course, this tests suite also test some technology like WebVTT and WebNFC that no major browser cares about, and doesn't take performances into account, making the results not meaningful. So yes, the road will be long to reach 95%, certainly much more long that for 90% (Pareto principle), but still, coming from a browser initially made for yet another Unix-compatible Windows 95 ripoff, that's pretty good.
Looking forward to making Ladybird my default browser in the future!