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Get insight into the performance of the website in the current tab - sort of a mini live version of WebPageTest.

Performance-Analyser helps to analyze the current page through the Resource, Navigation and User Timing APIs - see requests by type, domain, load times, marks and more - instantly.

Performance-Analyser is the Firefox Addon version of Performance-Bookmarklet.

Code: https://github.com/micmro/performance-bookmarklet