fix: strip self-referrals from tracking script

CHANGELOG.md

@@ -9,6 +9,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 ### Fixed
 
 - **More accurate pageview counts.** Refreshing a page no longer inflates your pageview numbers. The tracking script now detects when the same page is loaded again within a few seconds and skips the duplicate, so metrics like total pageviews, pages per session, and visit duration reflect real navigation instead of reload habits.
+- **Self-referrals no longer pollute your traffic sources.** Internal navigation within your own site (e.g. clicking from your homepage to your about page) no longer shows your own domain as a referrer. Only external traffic sources appear in your Referrers panel now.
 
 ## [0.15.0-alpha] - 2026-03-13
 

public/script.js

@@ -270,7 +270,18 @@
     lcpObserved = false;
     clsObserved = false;
     currentEventId = null;
-    const referrer = document.referrer || '';
+    // * Strip self-referrals: don't send referrer if it matches the current site domain
+    var rawReferrer = document.referrer || '';
+    var referrer = '';
+    if (rawReferrer) {
+      try {
+        var refHost = new URL(rawReferrer).hostname.replace(/^www\./, '');
+        var siteHost = domain.replace(/^www\./, '');
+        if (refHost !== siteHost) referrer = rawReferrer;
+      } catch (e) {
+        referrer = rawReferrer;
+      }
+    }
     const screen = {
       width: window.innerWidth || screen.width,
       height: window.innerHeight || screen.height,