Modern browsers come with Web Developer Tools that allow you to inspect a site’s inner workings and make live-edits, watching the results in real-time.
While the Firefox developer edition is available for Linux, its installation is not as straightforward. Here’s how to install Firefox Developer edition in Linux.
Google Chrome comes with a nifty tool that allows you to test how your website render in various mobile device. Here is how you can use the device mode in Chrome.