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

you can block any request (even for a single css file) from inspector with the following:
    Right click > block request URL
without disabling other css files > https://umaar.com/dev-tips/68-block-requests/ It's a standard inspector feature, no plugins or tricks needed