پلگ ان ٹیگ: layout shift
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Inline Image Base64 – inline specific images into the HTML
Improve the rendering performance inlining the little images directly into the HTML as base64 (e.g. the logo).
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RobArt CatchNet
Find the CSS behind layout shifts, FOUC flashes, phantom scrolling and stubborn overlays. Inspect page-load frames and reproduce visual bugs.