Basically, Chrome 73 is the latest version of Google Chrome.
Google Chrome 73 (73.0.3683.75) is out now with various new features and improvements, as well as lots of security and bug fixes to make your Chrome browsing experience more enjoyable, safe, and secure at all times. You also have the option to turn the mode on permanently if you want to use it for Chrome but keep your device's operating system on the default "light" theme.
Sure, you could download "dark mode" themes from the Chrome store before, Chrome's native dark mode features the design sensibilities one would expect from Google. The rollout of Chrome 73 is staged and will soon reach users on the aforementioned platforms.
Besides the Dark Mode, the update also brings along a number of other changes and improvements including improvements in synching and account sign-in, support for media hardware keys, and auto Picture in Picture.
Allow a few minutes for the browser to download Chrome 73. As for the Dark mode in the macOS version, it looks very similar to how Chrome looks when used in incognito mode.
Finally, as Chrome 73 adds progressive web app support to the macOS version of Chrome, and developers can now add badge API to web apps for desktop browsers so that notifications alerts (such as unread notifications) can be displayed over the app's icon from Chrome's home page. Signed HTTP exchanges and constructible style sheets are among the other features arriving with Chrome browser's latest build.
Sadly for Windows users, the dark mode support is nowhere to be found.
Chrome Lite Pages combines two of Google's major concerns for the mobile web.