Chrome 109 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 2023-01-10 for public access and a brief summary of important updates and change log pertaining to this edition can be read below.

Google Chrome 109.0.5414.75 was built on Blink 109 layout engine using JavaScript V10 engine version 10.9.194. This version is released for Windows, iOS and android platforms and has many functionality additions apart from number of fixes and improvements. 

• MathML Core:  This edition supports Mathematical Markup Language (MathML), an XML-based language for describing mathematical notation in a way that can be included in HTML and SVG. It is rendered in a CSS-compatible way with OpenType MATH and exposed via platform accessibility APIs. MathML Core is a subset with increased implementation details tailored for browsers and designed specifically to work well with other web standards including HTML, CSS, DOM, JavaScript. 
• New CSS Properties: New set of CSS properties are added in this edition including new length unit: lh, which allows a textarea to be given a height that is the same as the number of lines of expected text. Another property The hyphenate-limit-chars specifies the minimum number of characters in a hyphenated word which provide better control over web typography. 
• MediaTrackSupportedConstraints: Audio playback of  external speakers can be better controlled using the property property suppressLocalAudioPlayback.
  
• Conditional Focus API: Users can have  better screen sharing controls using Conditional Focus API, a mechanism for web apps to control whether the captured tab or window will be focused when capture starts, or whether the capturing page will remain focused.
  
• Media Source Extensions API: This JavaScript API is now available in worker context which can build streams for playback from segments of audio and video elements. It can ultimately benefit the user for customizing the performance and downloadsize depends on the internet connectivity conditions.
• Deprecations:  None of the functions and APIs worth notable are deprecated in this edition. 
• Support for Win 7 / 8 / 8.1:  There are unofficial information available that, this edition may be the last update and eventually Chrome might drop support for Windows versions till 8.1.  

• Stability and performance improvements
  

• Secure Payment Confirmation: It is a proposed web standard that allows customers to authenticate with a credit card issuer, bank, or other payment service provider using a platform authenticator—typically activated with a device's screen unlock feature such as a fingerprint sensor.
• OPFS API: The Origin Private File System (OPFS) is part of the File System Access API, it is a storage endpoint private to the origin of the page is available on Android, which was introduced in desktop edition in Chrome 102.
  
• Stability and performance improvements.