diff --git a/.gitignore b/.gitignore
index 3eb6b2b5a..76db2bd06 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+.history
 .DS_Store
 node_modules
 build.txt
diff --git a/js/models/spine.js b/js/models/spine.js
index d1c6517a7..ab62f2a5e 100644
--- a/js/models/spine.js
+++ b/js/models/spine.js
@@ -286,13 +286,17 @@ var Spine = function(epubPackage, spineDTO) {
      */
     this.getItemByHref = function(href) {
         
-        var href1 = new URI(self.package.resolveRelativeUrl(href)).normalizePathname().pathname();
+        var href1_ = self.package.resolveRelativeUrl(href);
+        href1_ = href1_.replace("filesystem:chrome-extension://", "filesystem-chrome-extension://");
+        var href1 = new URI(href1_).normalizePathname().pathname();
         
         var length = self.items.length;
 
         for(var i = 0; i < length; i++) {
             
-            var href2 = new URI(self.package.resolveRelativeUrl(self.items[i].href)).normalizePathname().pathname();
+            var href2_ = self.package.resolveRelativeUrl(self.items[i].href);
+            href2_ = href2_.replace("filesystem:chrome-extension://", "filesystem-chrome-extension://");
+            var href2 = new URI(href2_).normalizePathname().pathname();
             
             if(href1 == href2) {
                 return self.items[i];
diff --git a/readium-cfi-js b/readium-cfi-js
index 84b1542ae..3e5155bc1 160000
--- a/readium-cfi-js
+++ b/readium-cfi-js
@@ -1 +1 @@
-Subproject commit 84b1542aeceb65da75fd7459c5e7a65514cee8d1
+Subproject commit 3e5155bc1a11b055d9d4a9b4a39449ea8a035ee3