If you set a width of 1000px and a max-width of 100%, then view it through a 300px wide viewport, the content will overflow. What happens in that case is determined by your overflow property (I'm ...

Firefox 60 also adds a new option to view the page source code, located in the overflow menu. The update is still rolling out on the Play Store, so if you want to try v60 right now, you should ...