diff --git a/Makefile b/Makefile
index eaaa3e81f..adeb91b12 100644
--- a/Makefile
+++ b/Makefile
@@ -252,16 +252,16 @@ extension: | production
 	@cp -r $(EXTENSION_WEB_FILES) $(FIREFOX_BUILD_CONTENT)/web/
 	@rm $(FIREFOX_BUILD_CONTENT)/web/viewer-production.html
 	# Copy over the firefox extension snippet so we can inline pdf.js in it
-	cp web/viewer-snippet-firefox-extension.html $(FIREFOX_BUILD_CONTENT)/web/
+	@cp web/viewer-snippet-firefox-extension.html $(FIREFOX_BUILD_CONTENT)/web/
 	# Modify the viewer so it does all the extension only stuff.
-	cd $(FIREFOX_BUILD_CONTENT)/web; \
+	@cd $(FIREFOX_BUILD_CONTENT)/web; \
 	sed -i.bak '/PDFJSSCRIPT_INCLUDE_BUNDLE/ r ../build/pdf.js' viewer-snippet-firefox-extension.html; \
 	sed -i.bak '/PDFJSSCRIPT_REMOVE/d' viewer.html; \
 	sed -i.bak '/PDFJSSCRIPT_REMOVE_FIREFOX_EXTENSION/d' viewer.html; \
 	sed -i.bak '/PDFJSSCRIPT_INCLUDE_FIREFOX_EXTENSION/ r viewer-snippet-firefox-extension.html' viewer.html; \
 	rm -f *.bak;
 	# We don't need pdf.js anymore since its inlined
-	rm -Rf $(FIREFOX_BUILD_CONTENT)/$(BUILD_DIR)/;
+	@rm -Rf $(FIREFOX_BUILD_CONTENT)/$(BUILD_DIR)/;
 	# Update the build version number
 	@sed -i.bak "s/PDFJSSCRIPT_BUILD/$(BUILD_NUMBER)/" $(FIREFOX_BUILD_DIR)/install.rdf
 	@sed -i.bak "s/PDFJSSCRIPT_BUILD/$(BUILD_NUMBER)/" $(FIREFOX_BUILD_DIR)/update.rdf
diff --git a/extensions/firefox/components/PdfStreamConverter.js b/extensions/firefox/components/PdfStreamConverter.js
index 83c930d51..984915d23 100644
--- a/extensions/firefox/components/PdfStreamConverter.js
+++ b/extensions/firefox/components/PdfStreamConverter.js
@@ -35,7 +35,7 @@ ChromeActions.prototype = {
   download: function(data) {
     Services.wm.getMostRecentWindow('navigator:browser').saveURL(data);
   },
-  setDatabase: function() {
+  setDatabase: function(data) {
     if (this.inPrivateBrowswing)
       return;
     application.prefs.setValue(EXT_PREFIX + '.database', data);
@@ -51,8 +51,8 @@ ChromeActions.prototype = {
 function RequestListener(actions) {
   this.actions = actions;
 }
-// Recieves an event and synchronously responds.
-RequestListener.prototype.recieve = function(event) {
+// Receive an event and synchronously responds.
+RequestListener.prototype.receive = function(event) {
   var message = event.target;
   var action = message.getUserData('action');
   var data = message.getUserData('data');
@@ -143,7 +143,7 @@ PdfStreamConverter.prototype = {
         gb.removeEventListener('DOMContentLoaded', domListener);
         var requestListener = new RequestListener(new ChromeActions());
         win.addEventListener(PDFJS_EVENT_ID, function(event) {
-          requestListener.recieve(event);
+          requestListener.receive(event);
         }, false, true);
       }
     };