Stylebot
You pick an element and choose any changes you want to make from the editor. You can change the font, color, margins, visibility and a lot more. You can also code CSS manually. ★ Easy to use: Pick and style elements using UI actions ★ Simple & Quick: Changes are saved instantly ★ Code editor - Write your own CSS ★ Readability Mode - Make articles on any site readable by hiding non-essential page elements like sidebars, footers and ads. ★ Grayscale Mode - Turn on grayscale to reduce strain from websites