--- title: Safari Technology Preview 144 Release Notes framework: safari-technology-preview-release-notes role: article role_heading: Article path: safari-technology-preview-release-notes/stp-release-144 --- # Safari Technology Preview 144 Release Notes Preview the latest web technology updates including: Web Inspector, CSS, Web Animations, JavaScript, WebAuthn, Web API, Accessibility, Media, Security Policy, and Web Extensions. ## Overview Overview Safari Technology Preview Release 144 is now available for download for macOS Big Sur and of 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 291506-291957. This release of Safari Technology Preview does not support versions of macOS Monterey prior to 12.3. Please update to macOS Monterey 12.3 or later to continue using Safari Technology Preview. Note: Tab Groups do not sync in this release. Web Inspector Fixed page reloading and showing an empty inspector on pages with container queries (r291824) Elements Tab Fixed $0 not being displayed for the selected node after switching to another tab (r291729) Fixed unwanted extra dash when autocompleting CSS variable names in the Styles panel (r291740) Fixed inline swatch popovers not being hidden when the inline swatch is removed (r291628) Console Tab Fixed console.screenshot to no longer have extra transparent pixels at the bottom of viewport screenshots (r291519) CSS Added Typed OM support for container units (r291524) Fixed CSS cascade regarding logical properties (r291546) Fixed incorrect handling of NaN inside calc() for top-level calculation (r291911) Let revert-layer roll back to presentational hints (r291594) Implemented border-image serialization (r291537) Preserved repeat() notation when serializing grid-templates (r291956) Reduce memory usage for large, sparse grids (r291952) Handled finite value with infinite step in round() for calc() (r291841) Fixed incorrect resolution of percentage grid-gaps within subgrids (r291953) Web Animations Enabled support for mutable timelines by default (r291868) JavaScript Changed Date.parse to stop returning numbers with fractional part (r291603) Fixed class field initializer with extra parentheses (r291577) WebAuthn Added getAssertion support for virtual HID authenticators (r291624) Specified correct ASCPublicKeyCredentialKind in configureAssertionOptions (r291761) Updated to pass along timeout to ASA and ignore timeout for conditional mediation requests (r291625) Web API Added support for focused and visible ServiceWorkerWindowClient states (r291888) Added a check for whether the origin can access storage in the Storage API (r291726) Disabled custom storage paths for IndexedDB and LocalStorage by default (r291909) Fixed PointerEvent.movementX to not always be 0 (r291886) Fixed Context2D drawImage(img, x, y, w, h) to not throw IndexSizeError when width or height are 0 (r291748) Fixed fetching a Blob URL with an unbounded Range header to correctly generate a Content-Range response header (r291622) Implemented CSSNumericValue.mul, CSSNumericValue.div, CSSNumericValue.add, CSSNumericValue.sub, CSSNumericValue.max, and CSSNumericValue.min (r291597) Implemented ServiceWorkerWindowClient.focus (r291938) Accessibility Included initial accessibility support for display: contents (r291570) Media Fixed a bug where clicking anywhere on the progress bar pauses some MSE video implementations (r291629) Fixed video playback for HEVC-encoded video with a lot of b-frames and a wide sliding window (r291813) Security Policy Fixed website policies not being respected when doing COOP-based process swap (r291606) Web Extensions Fixed a crash clicking on Safari App Extension toolbar items ## See Also ### 2022 - [Safari Technology Preview 160 Release Notes](safari-technology-preview-release-notes/stp-release-160.md) - [Safari Technology Preview 159 Release Notes](safari-technology-preview-release-notes/stp-release-159.md) - [Safari Technology Preview 158 Release Notes](safari-technology-preview-release-notes/stp-release-158.md) - [Safari Technology Preview 157 Release Notes](safari-technology-preview-release-notes/stp-release-157.md) - [Safari Technology Preview 156 Release Notes](safari-technology-preview-release-notes/stp-release-156.md) - [Safari Technology Preview 155 Release Notes](safari-technology-preview-release-notes/stp-release-155.md) - [Safari Technology Preview 154 Release Notes](safari-technology-preview-release-notes/stp-release-154.md) - [Safari Technology Preview 153 Release Notes](safari-technology-preview-release-notes/stp-release-153.md) - [Safari Technology Preview 152 Release Notes](safari-technology-preview-release-notes/stp-release-152.md) - [Safari Technology Preview 151 Release Notes](safari-technology-preview-release-notes/stp-release-151.md) - [Safari Technology Preview 150 Release Notes](safari-technology-preview-release-notes/stp-release-150.md) - [Safari Technology Preview 149 Release Notes](safari-technology-preview-release-notes/stp-release-149.md) - [Safari Technology Preview 148 Release Notes](safari-technology-preview-release-notes/stp-release-148.md) - [Safari Technology Preview 147 Release Notes](safari-technology-preview-release-notes/stp-release-147.md) - [Safari Technology Preview 146 Release Notes](safari-technology-preview-release-notes/stp-release-146.md)