How do you do repeated "Build & Run" builds with WebGL without recompiling?

We have a WebGL app that we launch using "Build & Run". This launches a localhost web server and connects Chrome to it, which is great. The thing is this build takes a really long time (even though it's a"Slow (fast build)" compile, our project is quite large). Is there any way to run the app multiple times without rebuilding it (when we don't change our C# code of course)?

I know we can right-click on the index.html file and launch it with Firefox, but that is a different thing. I'm asking about running with Unity's built-in webserver (or whatever the stack actually is for the localhost/Chrome "Build & Run" feature).

Thank you so much anybody that can help!