Some of the fundamental updates are:
1- CSS Paint API: It empowers the developers to programmatically draw an image
2- Server Timing API: Developers can evaluate the performance of web applications by taking into account the speed of both client and server
3- Web Authentication API: Creation of robust and verified scoped credentials by web applications
Chrome 65 is much faster and secured and it has already supported on Gmail. As far as the security is concerned, it supports draft-23 of the TLS 1.3 protocol.
Image Source: WccfTech