With specialized profiles, you can help identify issues without messing with your favorite settings.
Tagged "Dev Tools"
Walking through the steps within the Google Chrome dev tools to better mimic your users' devices.
Since audio and video are native HTML elements, you can change the playing speed with a quick console script
Simulating your web pages on Apple devices is easy with Safari's responsive design mode
A comprehensive guide for opening the dev tools in Chrome and Firefox
Using a console script to alter the content on a webpage
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