Web Messenger App allows you to browse web in desktop view, which comes handy for using/debugging websites that are only available for desktops.
Also it allows you to change your User-Agent, actually in default it is changed to Desktop user agent so that when you are browsing, you are seen as a Desktop and the website gives you it's desktop view rather than the mobile one.
Web Messenger is an advanced browser with some most essential capabilities, such as Desktop View.
Web Messenger is an in-app browser that allows users to access some developer features.
By also altering the Headers and Cookies, you may transfer your sessions, or test your websites/webAPI's functionalities in different use cases.