Ignore the option of trying to download, basically the website is trying to read the browser identification string, failing and then offering you the nearest equivalent it has available. The reason you are being told Chrome is not up to date is that the LG webOS browser is based on WebKit which is Apple's basis for its Safari browser and is used (or soon to be used, I'm looking at you Microsoft Edge) by pretty much every other major browser out there apart from Mozilla's Firefox. Yes webOS is 'nix under the hood, but this does not mean that you can just install a Linux app on the system, it would have to be written and compiled especially for the platform.