The IDE can automatically reload the page opened in a browser after you make changes to an HTML file, or the linked CSS and JavaScript files.

First, open the file from the IDE via the icon on the upper right-side of the editor or via View | Open in Browser | "browser name".

Reloading is triggered whenever changes are saved in the IDE, either automatically or using Press ⌘S (macOS) / Ctrl+S (Windows/Linux), or when changes are made to a file externally.