diff --git a/lib/less/browser.js b/lib/less/browser.js
index 2ad71ff..579d1e1 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'   ||