--- title: Safari Technology Preview 226 Release Notes framework: safari-technology-preview-release-notes role: article role_heading: Article path: safari-technology-preview-release-notes/stp-release-226 --- # Safari Technology Preview 226 Release Notes Learn about the latest web technology updates in Safari Technology Preview: CSS, Canvas, JavaScript, Media, Rendering, SVG, Storage, Web API, Web Extensions, and Web Inspector. ## Overview Overview Safari Technology Preview Release 226 is now available for download for macOS Tahoe and macOS Sequoia. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes WebKit changes between: 297661@main…298483@main. CSS New Features Added support for @scope(:host). (297670@main) (153443869) Added support for CSS tree-counting functions. (297768@main) (155624960) Added support for cross-origin() and referrer-policy() CSS URL modifiers. (297969@main) (155625162) Resolved Issues Fixed an issue where @namespace rules that failed insertion could still affect the namespace node. (297893@main) (156651404) Canvas Deprecations Removed non-standard legacy drawImageFromRect. (297846@main) (141681635) JavaScript New Features Added support for Math.sumPrecise. (297839@main) (155642395) Added WebIDL support for [Enumerated] extended attribute and related attributes. (298172@main) (156249490) Resolved Issues Fixed Intl.Local#language to return "und" if the language subtag is "und". (297585@main) (156248659) Fixed Intl to support non-continental timezones to align with the specification. (297749@main) (156424446) Fixed exception check errors by adding a missing exception check for Array#flat. (298221@main) (157525399) Media Resolved Issues Fixed WebVTT line-height to be normal by default, not 1. (297860@main) (156633220) Rendering Resolved Issues Fixed the cross axis direction in flexbox to properly consider text directionality when the cross axis aligns with the inline axis to handle direction property and flex-wrap: wrap-reverse interactions. (297876@main) (156540996) Deprecations Removed UA styles for h1 in article, aside, nav, and section. (297671@main) (151455566) SVG Resolved Issues Fixed handling semicolons at end of a keySplines value. (297793@main) (156511711) Fixed unnecessary rounding of viewportLocation in 'foreignObject' layout. (297986@main) (156740732) Storage Resolved Issues Fixed requestStorageAccess() should always grant access when called from a same-site iframe. (297818@main) (156545395) Fixed Storage Access API to not be usable in insecure contexts. (298179@main) (157337423) Fixed requestStorageAccess() to reject with a NotAllowedError. (298183@main) (157446015) Web API New Features Added support for document.caretPositionFromPoint(). (298336@main) (144101675) Added preview support for the Navigation API. (298483@main) (145595760) Resolved Issues Fixed the ability to delete a cookie through Cookie Store API that was set through document.cookie. (298397@main) (142339417) Fixed location.protocol setter to be restricted to HTTP(S) schemes. (298349@main) (157607342) Fixed CookieStore methods to strip tabs and spaces from the names and values passed in. (298470@main) (157907393) Web Extensions Resolved Issues Fixed sender.origin parameter to match window.location.origin. (297959@main) (155884667) Web Inspector Resolved Issues Fixed an issue that prevented scrolling of the Media details sidebar from the Elements tab. (298396@main) (157768497) ## See Also ### 2025 - [Safari Technology Preview 234 Release Notes](safari-technology-preview-release-notes/stp-release-234.md) - [Safari Technology Preview 233 Release Notes](safari-technology-preview-release-notes/stp-release-233.md) - [Safari Technology Preview 232 Release Notes](safari-technology-preview-release-notes/stp-release-232.md) - [Safari Technology Preview 231 Release Notes](safari-technology-preview-release-notes/stp-release-231.md) - [Safari Technology Preview 230 Release Notes](safari-technology-preview-release-notes/stp-release-230.md) - [Safari Technology Preview 229 Release Notes](safari-technology-preview-release-notes/stp-release-229.md) - [Safari Technology Preview 228 Release Notes](safari-technology-preview-release-notes/stp-release-228.md) - [Safari Technology Preview 227 Release Notes](safari-technology-preview-release-notes/stp-release-227.md) - [Safari Technology Preview 225 Release Notes](safari-technology-preview-release-notes/stp-release-225.md) - [Safari Technology Preview 224 Release Notes](safari-technology-preview-release-notes/stp-release-224.md) - [Safari Technology Preview 223 Release Notes](safari-technology-preview-release-notes/stp-release-223.md) - [Safari Technology Preview 222 Release Notes](safari-technology-preview-release-notes/stp-release-222.md) - [Safari Technology Preview 221 Release Notes](safari-technology-preview-release-notes/stp-release-221.md) - [Safari Technology Preview 220 Release Notes](safari-technology-preview-release-notes/stp-release-220.md) - [Safari Technology Preview 219 Release Notes](safari-technology-preview-release-notes/stp-release-219.md)