Description from extension meta
DevTools Recorder Panel extension that exports MemLab scenario files
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Description from store
Memlab is tool by Facebook that helps you accelerate the discovery of memory leaks (and their sources!) in your web application. This extension lets you generate "scenario" files used by Memlab by just clicking elements in your web app. The extension integrates with Chrome's DevTools' Recorder panel
The extension code is available on GitHub https://github.com/stoyan/memlab-recorder where you can also read more about Memlab and the Scenario files