On Windows 10, web pages in Dreamweaver cannot be previewed on Microsoft Edge using the Preview In Browser option.
Solution
To use Microsoft Edge to preview your web pages, perform the following actions:
Ensure that Microsoft Edge is configured as the default browser on your Windows machine.
In Dreamweaver, perform the following actions:
Go to Edit > Preferences, and click Preview In Browser in the Category list.
Preferences (Preview in Browser)
Click + to add a new browser to the list of browsers that appear in the Preview In Browser option.
Click + to add a new browser
In the Add Browser dialog box, specify a friendly name for the browser, for example, Edge. Then, specify C:/Windows/explorer.exe as the path for the application.
Add Browser dialog box
Based on whether you want to use Microsoft Edge as the primary or secondary browser, select the appropriate option.
Click OK. Then, click Apply to apply the changes and Close to close the Preferences dialog box.