The good news is that all of those same tools are actually available. You can view the Hub (and thus all of the apps) of Sense in a browser window by going to http://localhost:4848/hub
Once in the app, you could use whatever tools you normally would, like the developers console in chrome.
Also, if you want to stay in the desktop edition, there's a little easter egg where you can hold down ctrl+shift and then right click on the sheet. You'll see this menu come up:
If you click on "Show DevTools" you'll see the Chrome Console (I think) appear in a separate tab.