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WebPageTest's new Opportunities and Experiments: test practically anything

Learn what you can do with the new and incredibly useful test tools from WebPageTest – with no coding required. ....

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Functions for Core Web Vitals Tactics with Cloudflare's HTMLRewriter

The HTMLRewriter() API gives us the ability to use jQuery-style element selectors to attach to HTML elements in raw page source to run JavaScript from that foothold. ....

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Evolving Core Web Vitals tactics using Cloudflare and WebpageTest

In this article, we demonstrate an evolution from an original concept for a testbed to a project suitable for our future events and articles. ....

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Your guide to Core Web Vitals tactics using Cloudflare and WebpageTest

Here is how to test Core Web Vitals scores and code changes using Cloudflare Workers as a reverse proxy and WebpageTest. ....

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SharedArrayBuffer warnings in Search Console: Clarifying a new cross-origin isolation security policy

SharedArrayBuffer warnings in Search Console: Clarifying a new cross-origin isolation security policy
Android Chrome 88 and desktop Chrome 91, plus Firefox 79+ now implement SharedArrayBuffers again after Spectre caused a multiyear security blackout on the feature until new security requirements were in place.
Detlef Johnson on March 16, 2021 at 12:07 pm
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Web-facing pages are an information security battle zone as we fight hackers who try to steal company secrets. Modern webpages often leverage resources from more than one origin (domain). This can lead to vulnerabilities. As pressure mounts surrounding security concerns that affect new features, webmasters have a growing list of options from browser makers, including directives for handling “cross-origin” resources to help prevent information leaks. ....

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