Bug 554873 - Fix test order in makefile & remove disabled test comment.

browser/components/sessionstore/test/browser/Makefile.in

@@ -46,7 +46,6 @@ include $(DEPTH)/config/autoconf.mk
 include $(topsrcdir)/config/rules.mk
 
 # browser_506482.js is disabled because of frequent failures (bug 538672)
-# browser_524745.js is disabled because of frequent failures (bug 539002)
 # browser_526613.js is disabled because of frequent failures (bug 534489)
 
 _BROWSER_TEST_FILES = \
@@ -113,8 +112,8 @@ _BROWSER_TEST_FILES = \
 	browser_500328.js \
 	browser_514751.js \
 	browser_522545.js \
-	browser_528776.js \
 	browser_524745.js \
+	browser_528776.js \
 	$(NULL)
 
 libs:: $(_BROWSER_TEST_FILES)