Disable the tests for bug 394759 to see whether they're causing other test bustage.

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

@@ -47,6 +47,8 @@ include $(topsrcdir)/config/rules.mk
 
 # browser_477657.js is disabled, because it's unreliable (bug 482975).
 # browser_480148.js is disabled, because it breaks browser_420786.js (see bug 483382).
+# browser_394759.js is disabled on suspicion of breaking various other tests
+# browser_394759_privatebrowsing.js likewise
 
 _BROWSER_TEST_FILES = \
 	browser_248970_a.js \
@@ -60,8 +62,6 @@ _BROWSER_TEST_FILES = \
 	browser_350525.js \
 	browser_367052.js \
 	browser_393716.js \
-	browser_394759.js \
-	browser_394759_privatebrowsing.js \
 	browser_408470.js \
 	browser_408470_sample.html \
 	browser_447951.js \