Quick Tip: Faster Element Inspection with Safari and iOS Simulator
Chrome and Firefox are probably the gold standard for friendly web developer tools, but I still use Safari all the time. It's the best option for debugging sites on iOS using the remote debugging features. You open your site in Safari running in the iOS simulator, and in the Develop menu, like this:
Chrome's remote debugging for Android devices is more fully-featured, with better remote controlling of the device and whatnot, but iOS remote debugging is easier to set up, and still very helpful. Inspecting elements directly this way is going to save me a lot of time.