MWE For Lighthouse issue 15184
Add the following to your hosts file:
127.0.0.1 domain1.com
127.0.0.1 domain2.com
127.0.0.1 domain3.com
127.0.0.1 domain4.com
(restart browser to make hosts file changes take effect)
Run a local webserver, i.e. using python on mac
python -m SimpleHTTPServer 8000
Open the following URL in Chrome:
http://domain4.com:8000
Open the Lighthouse tab and run an audit. Potentially also run the profiler.
The different domains are introduced to make sure they are reported as different 'origins' in Lighthouse reports.