# Safari Technology Preview 135 Release Notes Preview the latest web technology updates including: Web Inspector and Web Driver, CSS, Web API, Scrolling, Rendering, WebAuthn, Media, WebRTC, WebGL, App Extensions, and Web Extensions. ## Overview [Safari Technology Preview](https://webkit.org/blog/6017/introducing-safari-technology-preview/) Release 135 is now [available for download](https://webkit.org/downloads/) for macOS Big Sur and macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This release covers WebKit revisions [284370-285101](https://trac.webkit.org/log?stop_rev=284370&rev=285101&limit=731). **Note:** Tab Groups do not sync in this release. ### Web Inspector and Web Driver - Fixed “testForLinkLabels” Accessibility audit to ignore anchors if `aria-hidden` ([r284986](https://trac.webkit.org/changeset/284986/webkit/)) - Added support for the `acceptInsecureCerts` capability ([r285164](https://trac.webkit.org/changeset/285164/webkit)) ### CSS - Media queries affect Cascade Layer order ([r284859](https://trac.webkit.org/changeset/284859/webkit/)) - Enabled `accent-color` by default ([r284634](https://trac.webkit.org/changeset/284634/webkit/)) - Added support for small `svw`/`svh`/`svmin`/`svmax`, large `lvw`/`lvh`/`lvmin`/`lvmax`, and dynamic `dvw`/`dvh`/`dvmin`/`dvmax` viewport units ([r284628](https://trac.webkit.org/changeset/284628/webkit/)) - Added `flex-basis: content` support ([r284440](https://trac.webkit.org/changeset/284440/webkit/)) - Added support for `contain: style` for counters ([r284642](https://trac.webkit.org/changeset/284642/webkit/), [r284755](https://trac.webkit.org/changeset/284755/webkit/)) - Added support for `::before` and `::after` pseudo elements after `::slotted` ([r284973](https://trac.webkit.org/changeset/284973/webkit/)) - Added support for more CSS properties for `::marker` ([r284519](https://trac.webkit.org/changeset/284519/webkit/)) - Allowed `:is` and `:where` after all pseudo elements ([r285054](https://trac.webkit.org/changeset/285054/webkit/)) - Made `:-webkit-any()` a synonym of `:is()` ([r285032](https://trac.webkit.org/changeset/285032/webkit/)) - Fixed `::part(foo):hover` ([r284865](https://trac.webkit.org/changeset/284865/webkit/)) - Serialized `:part()` argument as identifier ([r284863](https://trac.webkit.org/changeset/284863/webkit/)) - Fixed `:host` invalidation when combined with pseudo classes in descendant position ([r285100](https://trac.webkit.org/changeset/285100/webkit/)) - Prevented clamping flex base size with `min-height`, `max-height`, `min-width`, and `max-width` ([r284397](https://trac.webkit.org/changeset/284397/webkit/)) - Fixed sizing of orthogonal elements with percentage margins ([r284773](https://trac.webkit.org/changeset/284773/webkit/)) - Fixed `-webkit-background-clip: text` to paint correctly for inline box spanning multiple lines ([r284380](https://trac.webkit.org/changeset/284380/webkit/)) - Fixed `box-shadow` and `text-shadow` to yield float values while interpolating ([r284437](https://trac.webkit.org/changeset/284437/webkit/)) - Fixed CSS serialization affecting `grid-auto-flow` ([r284876](https://trac.webkit.org/changeset/284876/webkit/)) - Fixed percentages on orthogonal replaced children ([r284548](https://trac.webkit.org/changeset/284548/webkit/)) - Fixed the `border-radius` value from `.style` to be readable when it includes a `var()` ([r285015](https://trac.webkit.org/changeset/285015/webkit/)) - Fixed opacity to flatten when combined with `transform-style: preserve-3d` ([r285021](https://trac.webkit.org/changeset/285021/webkit/)) ### Web API - Enabled lazy image loading by default ([r284995](https://trac.webkit.org/changeset/284995/webkit/)) - Added support for `rel="noopener/noreferrer"` on `

` elements ([r284749](https://trac.webkit.org/changeset/284749/webkit/)) - Exposed MediaCapabilities to Workers ([r284443](https://trac.webkit.org/changeset/284443/webkit/)) - Fixed `anchor.relList.supports("opener")` to return `true` ([r284745](https://trac.webkit.org/changeset/284745/webkit/)) - Fixed changing the `src` attribute of the `` element inside an ImageDocument to trigger a load ([r284901](https://trac.webkit.org/changeset/284901/webkit/)) - Fixed `document.open()` and friends to use the correct document as a source for reset document’s URL ([r284758](https://trac.webkit.org/changeset/284758/webkit/)) - Fixed form navigations with `target="_blank"` to not have an opener ([r284821](https://trac.webkit.org/changeset/284821/webkit/)) - Fixed form submission to be cancelled if the form gets detached from inside the formdata event handler ([r284660](https://trac.webkit.org/changeset/284660/webkit/)) - Fixed JavaScript URL result to be treated as UTF-8 bytes ([r284934](https://trac.webkit.org/changeset/284934/webkit/)) - Fixed Origin of opaque `blob:` URLs to be null instead of an empty string ([r284478](https://trac.webkit.org/changeset/284478/webkit/)) - Fixed selection `extend()` with no ranges to trigger an exception ([r285084](https://trac.webkit.org/changeset/285084/webkit/)) - Fixed the intrinsic size of a picture image inside a template ([r284667](https://trac.webkit.org/changeset/284667/webkit/)) - Updated appearance of `