PageSpeed: Avoid Flash on mobile webpages (deprecated)

Recommendations

Lighthouse
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PageSpeed (Legacy)
YSlow (Legacy)

Overview

Adobe Flash is not supported on many mobile devices, so its use should be avoided on pages that are viewed on mobile devices. HTML5 is now universally supported on major mobile devices, so if you require Flash-like elements, consider switching to HTML5 alternatives.

Note: This rule is experimental.

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