Pesticide – Faster CSS layout debugging


This extension inserts the Pesticide CSS into the current page, outlining each element to better see placement on the page.

Pesticide is an open source CSS tool created by Adam Morse.Pesticide can be used a variety of ways – Chrom Extension,Safari extension or download at GitHub as an open source.


Pesticide toggle outlines on any website with this handy chrome extension Or this handy Safari extension. The only drawback is the outlines don’t persist on page refresh. If that is your desire – it is recommended that you install it locally.