Here are the docs for Safari 9.1: <a href="https:&#x2F;&#x2F;developer.apple.com&#x2F;library&#x2F;prerelease&#x2F;ios&#x2F;releasenotes&#x2F;General&#x2F;WhatsNewInSafari&#x2F;Articles&#x2F;Safari_9_1.html" rel="nofollow">https:&#x2F;&#x2F;developer.apple.com&#x2F;library&#x2F;prerelease&#x2F;ios&#x2F;releaseno...</a><p>No support for service workers unfortunately.