Merge pull request #24 from Seanstoppable/addmkttok

Add mkt_tok marketing tokens

Author: jparise

README.md

@@ -12,6 +12,7 @@ The following query string parameters are stripped:
 
  - fbclid
  - gclid
+ - mkt_tok
  - utm_source
  - utm_medium
  - utm_term

background.js

@@ -1,9 +1,11 @@
-var utm_re = new RegExp('([\?\&]((g|fb)clid|utm_(source|medium|term|campaign|content|cid|reader|name))=[^&#]+)', 'ig');
+var utm_re = new RegExp('([\?\&](mkt_tok|(g|fb)clid|utm_(source|medium|term|campaign|content|cid|reader|name))=[^&#]+)', 'ig');
 
 chrome.webRequest.onBeforeRequest.addListener(function(details) {
     var url = details.url;
     var queryStringIndex = url.indexOf('?');
-    if (url.indexOf('utm_') > queryStringIndex || url.indexOf('clid') > queryStringIndex) {
+    if (url.indexOf('utm_') > queryStringIndex ||
+      url.indexOf('clid') > queryStringIndex ||
+      url.indexOf('mkt_tok') > queryStringIndex) {
         var stripped = url.replace(utm_re, '');
         if (stripped.charAt(queryStringIndex) === '&') {
             stripped = stripped.substr(0, queryStringIndex) + '?' +