You can start the built-in browser by double-clicking on the fxsvgBrowser.jar jar file.
Menu
The browser allows to:
Open a SVG file using the library
Save the opened SVG file as a png of jpeg image
Refresh the currently selected image
Zooming
You can zoom or dezoom the image by using the mouse wheel or the zoom commands.
Refresh the currently selected image
You can refresh the currently selected image by right clicking on the selected tab and select "Refresh". It can be useful if you have modified the associated SVG file externally.