News from WWDC26: WebKit in Safari 27 beta. Jen Simmons introduces 58 new features and 525 fixes: customizable <select>, scroll anchoring, transform-aware anchor positioning, WebAssembly JSPI, and top-level await. #safari#browser
https://t.co/wfGFllOif1
WebKit features for Safari 26.4. Jen Simmons introduces grid lanes for masonry layouts, WebTransport for low-latency communication, and the Keyboard Lock API. Plus name-only container queries, threaded scroll-driven animations, and 191 bug fixes.
https://t.co/3PL5Ojigxr
Safari is limited to 60fps by default across macOS, iOS, and iPadOS, even on 120Hz devices.
You can remove this limit by turning off “Prefer Page Rendering Updates near 60fps” under Settings → Apps → Safari → Advanced → Feature Flags.
RuntimeViewer beta latest version has been released, with full integration of SwiftInterface module (thanks to Runtime, we can obtain field offsets for non-generic structs/classes).
Code injection can now inject arm64e applications (e.g. System App)
https://t.co/ughysmiFIZ
I like that RHEL still shows penguins when booting!
Though if it's still supposed to indicate the number of cores in the system, it's missing a few. :)
Hermes is not "difficult" to embed. This is all it takes to embed Hermes (source link in response). Literally three statements:
- Create configuration
- Create runtime
- Evaluate JavaScript
WebKit’s rendering pipeline is often underestimated.
Every line of CSS, every shadow and transform, has real GPU cost.
If you're debugging jank, start by reducing overdraw and isolating paint layers.
Some people think Safari is “just another browser.”
But in reality, WebKit handles memory pressure, power efficiency, and rendering optimizations others skip.
Mobile-first performance isn’t a feature, it’s a constraint we embraced.
Every browser team makes tradeoffs.
At WebKit, ours are often invisible: better battery life, less memory usage, tighter sandboxing.
It’s not flashy, but it matters.
It's a bit of understatement to say @WebKit project cares about performance or efficiency of the software. We're quite obsessed with it, and we throw a lot of engineering resources at it, not to regress, and to improve upon.
Kali Linux & Containerization (Apple's Container): If you’re an Apple user, you may have heard of Apple’s upcoming feature Containerization during WWDC 2025. Quick summary:
* Container is a CLI tool, which works with Containerization. This is what… https://t.co/9JjWijOcgM