What's new in the WebKitGTK+ 2.15.4 release? ============================================ - Make accelerating compositing mode on-demand again. By default it will only be used for websites that require it, saving a lot of memory on websites that don't need it. - Add API to manage hardware acceleration policy. - Enable CSS Grid Layout by default. - Add API to create ephemeral WebViews to replace the legacy private browsing setting that is now deprecated. - Handle HTTP authentication for downloads having a WebView associated. - Add API to WebKitWebsiteDataManager to handle websites data. - Fix BadDamage X errors happening when resizing the WebView. - Fix several crashes and rendering issues.