Improvements

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Modify any website by adding small piece of JS. Remove ugly fonts, increase contrast, etc.What is it?

Improvements is chrome extension. It allows you to define JS code to be executed on sites you specify. It requires knowledge of JS, intended audience are programmers.

How to use it?

Let's say you want light gray background on www.google.sk. Open settings site, add "www.google.sk" to the "Page" input and type in this code:

document.body.style.backgroundColor = 'silver';

Hit "Save" button and when you visit www.google.sk, the background will be light gray.