This question already has an answer here:
- How to find exe listening on port? 3 answers
I have been using a personal HTTP proxy to remove ads and boost caching for a while but have then noticed that my Firefox still works when the proxy application is shut down (while the browser is configured to use proxy at 127.0.0.1:8080). Looks like there is another proxy running on my PC, perhaps even malicious. How to detect it?