As @hinkelman discussed, RInno uses Electron instead of the default browser.
And, @jdlong, although W. Lee Peng has been building desktop applications with R and was the inspiration for the RInno project, RInno takes it a step further than DesktopDeployR by compiling it into a standard application with Inno Setup and using code as configuration instead of having to understand the entire framework to make it work.