Data Saver: Google recently released a new one extension of the formerletterChrome browser in beta form that reduces your data usage.
Extension is called Data SaverAnd uses μια υπηρεσία μεσολάβησης για compression data from Google which aims to optimize the pages before they are served to your browser. It doesn't work with websites that use SSL (iGuRu.gr) for now, and you'll need Chrome 41 or later to use it.
The extension works very easily. Just do it click on the extension button located at line tools of your browser to see how much data it has saved and if you want from the same window you can disable it.
The feature is also available in Chrome for Android and iOS. To enable it, you can do it from Settings, click Data Saver and you're ready.
Google has begun testing the data compression service for browsers since March of 2013. The presentation of this beta extension could show us how Google imagines Chrome's functionality in future releases.