diff --git a/CHANGELOG.md b/CHANGELOG.md
index ed824cfdf..66de9ede5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## Current Master
 
 - Remove seedWords from UI state dump.
+- Inject web3 into loaded iFrames.
 
 ## 3.5.1 2017-3-27
 
diff --git a/app/manifest.json b/app/manifest.json
index 97cc7dd6d..a163d4c06 100644
--- a/app/manifest.json
+++ b/app/manifest.json
@@ -51,7 +51,7 @@
         "scripts/contentscript.js"
       ],
       "run_at": "document_start",
-      "all_frames": false
+      "all_frames": true
     }
   ],
   "permissions": [
diff --git a/app/scripts/contentscript.js b/app/scripts/contentscript.js
index 020208ceb..9a390e580 100644
--- a/app/scripts/contentscript.js
+++ b/app/scripts/contentscript.js
@@ -65,10 +65,10 @@ function setupStreams () {
 }
 
 function shouldInjectWeb3 () {
-  return isAllowedSuffix(window.location.href)
+  return doctypeCheck() || suffixCheck()
 }
 
-function isAllowedSuffix (testCase) {
+function doctypeCheck () {
   const doctype = window.document.doctype
   if (doctype) {
     return doctype.name === 'html'
@@ -76,3 +76,16 @@ function isAllowedSuffix (testCase) {
     return false
   }
 }
+
+function suffixCheck() {
+  var prohibitedTypes = ['xml', 'pdf']
+  var currentUrl = window.location.href
+  var currentRegex
+  for (let i = 0; i < prohibitedTypes.length; i++) {
+    currentRegex = new RegExp(`\.${prohibitedTypes[i]}$`)
+    if (currentRegex.test(currentUrl)) {
+      return false
+    }
+  }
+  return true
+}