WebExtensions for restoring and saving window / tab states
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Updated
Aug 3, 2025 - JavaScript
Universal standard for creating browser extensions.
Working through a W3C charter group, Mozilla has partnered with Microsoft and Opera to define a browser extension API that works across multiple browsers.
There is currently a preliminary specification that matches what Google has implemented in Chrome so that extensions written to the specification could potentially work on Chrome, Edge, Opera and Firefox.
WebExtensions for restoring and saving window / tab states
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