diff --git a/controllers/index.go b/controllers/index.go
index 06b68d27d..46f682d78 100644
--- a/controllers/index.go
+++ b/controllers/index.go
@@ -64,6 +64,9 @@ func IndexHandler(w http.ResponseWriter, r *http.Request) {
 	// Set a cache control max-age header
 	middleware.SetCachingHeaders(w, r)
 
+	// Opt-out of Google FLoC
+	middleware.DisableFloc(w)
+
 	http.ServeFile(w, r, path.Join(config.WebRoot, r.URL.Path))
 }
 
diff --git a/router/middleware/disableFloc.go b/router/middleware/disableFloc.go
new file mode 100644
index 000000000..9f6787dec
--- /dev/null
+++ b/router/middleware/disableFloc.go
@@ -0,0 +1,8 @@
+package middleware
+
+import "net/http"
+
+// DisableFloc will tell Google to not use this response in their FLoC tracking.
+func DisableFloc(w http.ResponseWriter) {
+	w.Header().Set("Permissions-Policy", "interest-cohort=()")
+}