🎨 Design Mode - Edit your page directly in the browser

Ok so this reddit post taught me that there is a design mode in the browser. As per MDN:

document.designMode controls whether the entire document is editable. Valid values are “on” and “off”. According to the specification, this property is meant to default to “off”. Firefox follows this standard. The earlier versions of Chrome and IE default to “inherit”. Starting in Chrome 43, the default is “off” and “inherit” is no longer supported. In IE6-10, the value is capitalized.

What this does is basically turn any web page you’re viewing into an editable document. Really useful for testing your design easily with different values or editing quick values for a screenshot!