diff --git a/background/detect.js b/background/detect.js
index ab3bff9..09b3ead 100644
--- a/background/detect.js
+++ b/background/detect.js
@@ -65,7 +65,7 @@ md.detect = ({storage: {state}, inject}) => {
           }
 
           if (detect(win.header, win.url)) {
-            if (onwakeup && chrome.webRequest) {
+            if (onwakeup && chrome.webRequest && !win.url.startsWith('file:')) {
               onwakeup = false
               chrome.tabs.reload(id)
             }
diff --git a/background/xhr.js b/background/xhr.js
index c06388c..a908b24 100644
--- a/background/xhr.js
+++ b/background/xhr.js
@@ -5,7 +5,8 @@ md.xhr = () => {
     ;(async () => {
       await new Promise(async (resolve, reject) => {
         try {
-          var res = await fetch(url + '?preventCache=' + Date.now())
+          var bust = url.startsWith('file:') ? '' : '?preventCache=' + Date.now()
+          var res = await fetch(url + bust)
           done(null, await res.text())
         }
         catch (err) {