Use Blacklight service in your terminal
Quote from Blacklight website: "...Blacklight is a real-time website privacy inspector. It will scan website and reveal the specific user-tracking technologies on the site—and who’s getting your data. You may be surprised at what you learn..."
$ ./blacklight "<url>"
$ ./blacklight 'kevcui.github.io'
> Inspection result:
0 No ad trackers found on this site.
0 Third-party cookies not found.
0 Tracking that evades cookie blockers wasn't found.
0 Session recording services not found on this website.
0 We did not find this website capturing keystrokes.
0 Facebook Pixel not found on this website.
0 Google Analytics' "remarketing audiences" feature not found.
$ ./blacklight 'www.nytimes.com'
> Inspection result:
10 Ad trackers found on this site.
7 Third-party cookies were found.
0 Tracking that evades cookie blockers wasn't found.
0 Session recording services not found on this website.
0 We did not find this website capturing keystrokes.
0 Facebook Pixel not found on this website.
! This site allows Google Analytics to follow you across the internet.
> Ad-tech companies:
Adobe: everesttech.net
Alphabet: ampproject.org, doubleclick.net, google-analytics.com, google.com, googlesyndication.com, googletagmanager.com, gstatic.com
comScore: scorecardresearch.com
Criteo: criteo.com, criteo.net
Microsoft: bing.com
Oracle: bkrtx.com, bluekai.com