The configuration page in the leaked version of the new browser has a special flag that confirms that Fluent Design will be part of the update Edge. The logo is named "Fluent Controls" and it will be a new Edge browser withMicrosoftAlready inWindowsThe new design language used in 10 is consistent with a series of other pre-installed core applications.
If enabled, HTML form elements will be rendered in an alternative style consistent with Microsoft's design language, thereby improving touch and keyboard accessibility - as described in the Settings Project.
You can view the parameters by typing edge://flags in the address bar and searching for the name "Fluent Controls", which is currently set to "default", so you need to click the drop-down menu and switch it to "enabled".
The implementation of Fluent Design in the new browser is still in its early stages. It may take some time to fit Windows 10 perfectly. It is worth mentioning that this leaked version of Microsoft Edge is still an unpublished experimental version of Microsoft, so it is likely that it will be officially launched and the design completeness of Fluent Design in the browser will be significantly improved.