diff --git a/README.md b/README.md
index c44ee46..e3ecf65 100755
--- a/README.md
+++ b/README.md
@@ -556,7 +556,7 @@ Check 'Options'-link in popup-menu and go to custom sites.
 \* by default BPC has limited permissions, but you can opt-in to enable custom sites (and also clear cookies/block general paywall-scripts for non-listed sites).\
 Make sure the (new) site is checked under Options (or check on/off-button).  
 By default sites' cookies/local storage are removed after page loads (to bypass article limit).  
-Also you can enable Googlebot user-agent or disable Javascript for (sub)domain(s)/external sources.
+Also you can enable Googlebot user-agent, disable Javascript for (sub)domain(s)/external sources and/or set the referer (to Facebook, Google or Twitter; ignored when Googlebot is set).
 
 ### Add excluded site
 Add excluded sites/domains (for your subscriptions).\
diff --git a/background.js b/background.js
index 005b02b..b23f52b 100755
--- a/background.js
+++ b/background.js
@@ -204,10 +204,14 @@ var use_bing_bot = [
   'themarker.com',
 ];
 
-var use_facebook_referer = ['clarin.com', 'fd.nl', 'law.com', 'sloanreview.mit.edu'];
-var use_twitter_referer = ['medium.com', 'towardsdatascience.com'];
+var use_facebook_referer_default = ['clarin.com', 'fd.nl', 'law.com', 'sloanreview.mit.edu'];
+var use_facebook_referer = use_facebook_referer_default.slice();
+var use_google_referer_default = [];
+var use_google_referer = use_google_referer_default.slice();
+var use_twitter_referer_default = ['medium.com', 'towardsdatascience.com'];
+var use_twitter_referer = use_twitter_referer_default.slice();
 var use_random_ip = ['esprit.presse.fr', 'slader.com'];
-var change_headers = use_google_bot.concat(use_bing_bot, use_facebook_referer, use_twitter_referer, use_random_ip);
+var change_headers = use_google_bot.concat(use_bing_bot, use_facebook_referer, use_google_referer, use_twitter_referer, use_random_ip);
 
 // block paywall-scripts individually
 var blockedRegexes = {
@@ -494,7 +498,10 @@ function add_grouped_sites(init_rules) {
     for (let domain of nl_pg_domains)
       remove_cookies_select_drop[domain] = ['TID_ID'];
     use_google_bot_default = use_google_bot.slice();
-    change_headers = use_google_bot.concat(use_bing_bot, use_facebook_referer, use_twitter_referer, use_random_ip);
+    use_facebook_referer_default = use_facebook_referer.slice();
+    use_google_referer_default = use_google_referer.slice();
+    use_twitter_referer_default = use_twitter_referer.slice();
+    change_headers = use_google_bot.concat(use_bing_bot, use_facebook_referer, use_google_referer, use_twitter_referer, use_random_ip);
   }
 }
 
@@ -519,6 +526,16 @@ ext_api.storage.local.get({
       block_js_custom.push(domainVar);
     if (sites_custom[key]['block_javascript_ext'] > 0)
       block_js_custom_ext.push(domainVar);
+    switch (sites_custom[key]['referer']) {
+    case 'facebook':
+      use_facebook_referer.push(domainVar);
+      break;
+    case 'google':
+      use_google_referer.push(domainVar);
+      break;
+    case 'twitter':
+      use_twitter_referer.push(domainVar);
+    }
   }
 
   enabledSites = Object.keys(sites).filter(function (key) {
@@ -601,6 +618,9 @@ ext_api.storage.onChanged.addListener(function (changes, namespace) {
       }
 
       use_google_bot = use_google_bot_default.slice();
+      use_facebook_referer = use_facebook_referer_default.slice();
+      use_google_referer = use_google_referer_default.slice();
+      use_twitter_referer = use_twitter_referer_default.slice();
       block_js_custom = [];
       block_js_custom_ext = [];
       for (let key in sites_custom) {
@@ -622,8 +642,18 @@ ext_api.storage.onChanged.addListener(function (changes, namespace) {
         if (sites_custom[key]['block_javascript_ext'] > 0) {
           block_js_custom_ext.push(domainVar);
         }
+        switch (sites_custom[key]['referer']) {
+        case 'facebook':
+          use_facebook_referer.push(domainVar);
+          break;
+        case 'google':
+          use_google_referer.push(domainVar);
+          break;
+        case 'twitter':
+          use_twitter_referer.push(domainVar);
+        }
       }
-      change_headers = use_google_bot.concat(use_bing_bot, use_facebook_referer, use_twitter_referer, use_random_ip);
+      change_headers = use_google_bot.concat(use_bing_bot, use_facebook_referer, use_google_referer, use_twitter_referer, use_random_ip);
     }
     if (key === 'sites_excluded') {
       var sites_excluded = storageChange.newValue ? storageChange.newValue : [];
@@ -891,12 +921,12 @@ if (['main_frame', 'xmlhttprequest'].includes(details.type) && matchUrlDomain(ch
   // if referer exists, set it to google
   requestHeaders = requestHeaders.map(function (requestHeader) {
     if (requestHeader.name === 'Referer') {
-      if (matchUrlDomain(use_facebook_referer, details.url)) {
+      if (matchUrlDomain(use_google_bot, details.url) || matchUrlDomain(use_google_referer, details.url)) {
+        requestHeader.value = 'https://www.google.com/';
+      } else if (matchUrlDomain(use_facebook_referer, details.url)) {
         requestHeader.value = 'https://www.facebook.com/';
       } else if (matchUrlDomain(use_twitter_referer, details.url)) {
         requestHeader.value = 'https://t.co/';
-      } else if (matchUrlDomain(use_google_bot, details.url)) {
-        requestHeader.value = 'https://www.google.com/';
       }
       setReferer = true;
     }
@@ -908,7 +938,12 @@ if (['main_frame', 'xmlhttprequest'].includes(details.type) && matchUrlDomain(ch
 
   // otherwise add it
   if (!setReferer) {
-      if (matchUrlDomain(use_facebook_referer, details.url)) {
+    if (matchUrlDomain(use_google_bot, details.url) || matchUrlDomain(use_google_referer, details.url)) {
+      requestHeaders.push({
+        name: 'Referer',
+        value: 'https://www.google.com/'
+      });
+    } else if (matchUrlDomain(use_facebook_referer, details.url)) {
       requestHeaders.push({
         name: 'Referer',
         value: 'https://www.facebook.com/'
@@ -918,11 +953,6 @@ if (['main_frame', 'xmlhttprequest'].includes(details.type) && matchUrlDomain(ch
         name: 'Referer',
         value: 'https://t.co/'
       });
-    } else {
-      requestHeaders.push({
-        name: 'Referer',
-        value: 'https://www.google.com/'
-      });
     }
   }
 
diff --git a/changelog.txt b/changelog.txt
index 92b1722..cb34507 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -10,6 +10,7 @@ Fix-update Madsack Mediengruppe (amp)
 Fix-update Medium/Towards Data Science (login) & add custom domains in options
 Fix-update Stratfor (style; not menu)
 Fix-update Sud Ouest (decode text)
+Update custom sites (set referer)
 
 * v2.0.6.0 (2021-01-31)
 Add Griffith Review (Australia)
diff --git a/manifest.json b/manifest.json
index 2689844..2efa411 100755
--- a/manifest.json
+++ b/manifest.json
@@ -444,5 +444,5 @@
         "*://*.userzoom.com/*",
         "*://*.wsj.net/*"
     ],
-    "version": "2.0.6.7"
+    "version": "2.0.6.8"
 }
\ No newline at end of file
diff --git a/options_custom.html b/options_custom.html
index f2c2a5e..b7b804b 100644
--- a/options_custom.html
+++ b/options_custom.html
@@ -19,7 +19,7 @@
 <body>
   <h2>Custom Sites</h2>
   <div style="width:90%;">
-    To add a new site, enter an unique title/domain (without www.) and select options for Googlebot/block Javascript (block on (sub)domain(s) of site and/or external domains).<br>
+    To add a new site, enter an unique title/domain (without www.), select options for Googlebot/block Javascript (block on (sub)domain(s) of site and/or external domains) and/or set referer (ignored when Googlebot is set).<br>
     Custom sites are enabled automatically in <small><button><a href="options.html" style="text-decoration:none;color:inherit">Options</a></button></small> (cookies will be removed by default unless you enable allow_cookies).<br>
     If you want to use custom sites (for non-listed sites) enable it in <small><button><a href="optin/opt-in.html" style="text-decoration:none;color:inherit">Opt-in</a></button></small><br>
     <strong>Custom sites enabled: <span id="custom-enabled"></span></strong>
diff --git a/options_custom.js b/options_custom.js
index fcae036..1ed1605 100644
--- a/options_custom.js
+++ b/options_custom.js
@@ -1,5 +1,7 @@
 var ext_api = chrome || browser;
 
+var referer_options = ['', 'facebook', 'google', 'twitter'];
+
 function capitalize(str) {
   if (typeof str !== 'string') return '';
   return str.charAt(0).toUpperCase() + str.slice(1);
@@ -87,7 +89,7 @@ function _imp() {
 
 // Add custom site to ext_api.storage
 function add_options() {
-    var inputEls = document.querySelectorAll('#add_site input');
+    var inputEls = document.querySelectorAll('#add_site input, #add_site select');
     var sites_custom = {};
 
     for (let i = 0; i < inputEls.length; i++) {
@@ -178,6 +180,7 @@ function edit_options() {
         document.querySelector('input[data-key="allow_cookies"]').checked = (edit_site.allow_cookies > 0);
         document.querySelector('input[data-key="block_javascript"]').checked = (edit_site.block_javascript > 0);
         document.querySelector('input[data-key="block_javascript_ext"]').checked = (edit_site.block_javascript_ext > 0);
+        document.querySelector('select[data-key="referer"]').selectedIndex = referer_options.indexOf(edit_site.referer);
     });
 }
 
@@ -225,6 +228,20 @@ function renderOptions() {
             add_sitesEl.appendChild(labelEl);
         }
 
+        labelEl = document.createElement('label');
+        labelEl.appendChild(document.createTextNode('referer '));
+        inputEl = document.createElement('select');
+        inputEl.dataset.key = 'referer';
+        labelEl.appendChild(inputEl);
+
+        for (var i = 0; i < referer_options.length; i++) {
+            var option = document.createElement("option");
+            option.value = referer_options[i];
+            option.text = referer_options[i];
+            inputEl.appendChild(option);
+        }
+        add_sitesEl.appendChild(labelEl);
+
         // list of custom sites
         var custom_sitesEl = document.getElementById('custom_sites');
         custom_sitesEl.innerHTML = '';
@@ -242,7 +259,8 @@ function renderOptions() {
                 (sites_custom[key]['googlebot']>0 ? ' | googlebot' : '') + 
                 (sites_custom[key]['allow_cookies']>0 ? ' | allow_cookies' : '') + 
                 (sites_custom[key]['block_javascript']>0 ? ' | block javascript' : '') + 
-                (sites_custom[key]['block_javascript_ext']>0 ? ' | block javascript ext' : '');
+                (sites_custom[key]['block_javascript_ext']>0 ? ' | block javascript ext' : '') +
+                (sites_custom[key]['referer'] ? ' | referer: ' +  sites_custom[key]['referer'] : '');
             optionEl.value = key;
             selectEl.add(optionEl);
         }