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New on the web platform in July: Firefox 153 and Chrome 151

Rachel Andrew summarizes July's stable releases. Firefox 153 widens how the select element is parsed so that any nested element is allowed inside it, which opens the path to genuinely customizable dropdowns without JavaScript replacements. The same release brings the Picture-in-Picture API to desktop, the Intl.Locale Info API with getCalendars(), getTimeZones(), and getWeekInfo(), and IndexedDB getAllRecords(). Chrome 151 adds the CSS ruby-overhang property, manual slot assignment in declarative Shadow DOM through the shadowrootslotassignment attribute, and the animation property on the AnimationEvent and TransitionEvent interfaces.

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