A Content Security Policy (CSP) lets developers improve security by putting restrictions on what resources can be loaded on a page. For example, a CSP can only allow requests from certain domains, or block inline script tags.
This report investigates how 1000 of the most popular Chrome extensions impact browser performance and end-user experience.
For my report on extension performance I first needed a list of Chrome extensions. This post takes a deeper look at the full list, looking at the most popular extensions, extension ratings, paid extensions, and top extension authors.
Update: read the 2021 Chrome Extension Performance Report
I tested how the 1000 most popular Chrome extensions affect browser performance.
The main metrics I'll consider are CPU consumption, memory consumption, and whether the extension makes pages render more slowly.
I tested 26 Chrome extensions to measure their impact on CPU consumption, page download size, and user experience.