How to disable CSS in Browser for testing purposes

Question

Is there any way I can disable all external CSS in a browser (Firefox, Chrome...)?

When using slower internet connection, sometimes only the bare HTML is loaded by t

Answer 1

Install Adblock Plus, then add *.css rule in Filters options (custom filters tab). The method affect only on external stylesheets. It doesn't turn off inline styles.

Disable all external CSS

This method does exactly what you asked.