ShadowFox - This project aims at creating a universal dark theme for Firefox while adhering to the modern...
Responsive Viewer - View multiple screen dimensions in one view
automaticDark - Time-Based Theme Changer - Set Firefox to change the UI to a dark theme during the night and change back to a light theme during the day!
Responsive Website Test - Test any website on desktop, mobile, and tablet
Night Owl (Firefox Theme) - The ultimate dark and white themes for Firefox!
LT Browser by Lambdatest - LT Browser is a free dev friendly browser for developers and testers. You can see mobile view of website on different screen sizes and resolution on 50+ pre installed view ports. You can build, test and debug your website faster then ever.