BrowserStack is a tool that we constantly rely on at OSTraining. It's an online service that makes it easy to do cross-browser compatibility testing. Whenever we update our site design or test a new feature, we can easily troubleshoot issues in major browsers and on mobile devices.

As developers and designers, we often make the mistake of testing our responsive design on a desktop computer. Resizing the browser can emulate the screen size of mobile device, however it doesn't provide a truly accurate result.