diff --git a/lib/less/browser.js b/lib/less/browser.js
index 544ec5a..8eff091 100644
--- a/lib/less/browser.js
+++ b/lib/less/browser.js
@@ -2,7 +2,9 @@
 // browser.js - client-side engine
 //
 
-var isFileProtocol = location.protocol === 'file:';
+var isFileProtocol = (location.protocol === 'file:' ||
+                      location.protocol === 'chrome:' ||
+                      location.protocol === 'resource:');
 
 less.env = location.hostname == '127.0.0.1' ||
            location.hostname == '0.0.0.0'   ||
@@ -47,7 +49,12 @@ if (less.env === 'development') {
     less.optimization = 3;
 }
 
-var cache = (typeof(window.localStorage) === 'undefined') ? null : window.localStorage;
+var cache;
+try {
+  cache = (typeof(window.localStorage) === 'undefined') ? null : window.localStorage;
+} catch (e) {
+  cache = null;
+}
 
 //
 // Get all <link> tags with the 'rel' attribute set to "stylesheet/less"
@@ -167,6 +174,9 @@ function xhr(url, callback, errback) {
     var xhr = getXMLHttpRequest();
     var async = isFileProtocol ? false : less.async;
 
+    if (typeof xhr.overrideMimeType === 'function') {
+      xhr.overrideMimeType('text/css');
+    }
     xhr.open('GET', url, async);
     xhr.send(null);
 
diff --git a/lib/less/parser.js b/lib/less/parser.js
index 3210848..e712842 100644
--- a/lib/less/parser.js
+++ b/lib/less/parser.js
@@ -229,7 +229,11 @@ less.Parser = function Parser(env) {
                                 chunks[++j] = [];
                             } else {
                                 if (c === '"' || c === "'") {
-                                    inString = inString === c ? false : c;
+                                    if (!inString) {
+                                        inString = c;
+                                    } else {
+                                        inString = inString === c ? false : inString;
+                                    }
                                 }
                                 chunk.push(c);
                             }