Safari is a great browser, and I use it as the default for both my Mac and my iOS devices. But that doesn’t mean that there aren’t uses for other browsers. I continue to keep Chrome installed on all my Mac’s for a single purpose: Flash. I don’t have any particular political stance on Flash; it’s just a pain to keep it updated.
Google’s Chrome browser has Flash built-in, and it automatically installs updates. This means that when you find a site that doesn’t have an HTML video player—an increasingly rare occurrence, but still something you run into now and then—you can just fire up Chrome and play the video. If you’re feeling particularly ambitious, you can use this workflow to create an AppleScript file to open the current page in Chrome.