I need to find out if any asp.net mvc applications use NewRelic. I passed all the references and did a text search with the object "NewRelic" but I didn't find any occurrences. Am I missing something? Thank you.
New Relic's APM agent is the one in charge of monitoring web apps. Assuming your app runs on Windows, you can check if the agent is installed in Start > All Programs > New Relic .NET Agent. If there's no such menu, there is most likely no agent running.
Also, check if the following file exist in your code base newrelic.config.
As for New Relic's Browser agent (Real User Monitoring), take a look at the generated HTML of your web app, and if you spot the following string in the code window.NREUM it means that Browser is instrumented either manually (snippet in the HTML template, like Google Analytics) or automatically through the APM agent.
Source: uninstallation docs.