Bug 1244904 - Skip all browser/components/sessionstore tests on non-e10s Linux; r=mikedeboer

browser/components/sessionstore/test/browser.ini

@@ -8,6 +8,7 @@
 # browser_580512.js is disabled for leaking browser windows (bug 752467)
 
 [DEFAULT]
+skip-if = os == 'linux' && !e10s
 support-files =
   head.js
   content.js