Google Chrome 4 is a web browser developed by Google Inc, available for download in full install version for Windows platforms from legacy sources. This version of Chrome was officially released on 2010-01-25 for public access and a brief summary of important updates and change log pertaining to this edition can be read below.

Google Chrome 4.0.249 was built on WebKit 532.5 based on JavaScript V8 Engine version 1.3. It was a major release from the developer point of view as it introduced the extensions and developer tools. Google was experimenting the security tool XSS Auditor and bundled with this version. 

Major Updates

Extensions:  Google made the developer community happy with introduction of extensions and developer tools. Now any third party extension can be developed and deployed in Chrome Browser. Infact after this version Chrome extensions were mushrooming like WordPress extensions. It started the commercialization of Chrome development.

Improvements: HTML5 support was significantly improved in this version along with overall performance.

Technologies: This version offered HTTP Byte range support and XSS Auditor for security monitoring.