Firefox user.js for optimal privacy and security. Your favorite browser, but better.
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Performance-Bookmarklet helps to analyze the current page through the Resource Timing API, Navigation Timing API and User-Timing - requests by type, domain, load times, marks and more. Sort of a light live WebPageTest.
⚡️ Web Performance Research
Fast webpages for all browsers.
:musical_note: A tool for programmatic audio performance in the browser using Javascript.