Bug 1429575 - Disable test_browserui.xul for frequent failure on linux. r=gbrown

--HG--
extra : rebase_source : 1b012fc9e10219f3c5e64a7e55f4e8febeca121d

accessible/tests/mochitest/name/a11y.ini

@@ -8,6 +8,7 @@ support-files =
   !/accessible/tests/mochitest/moz.png
 
 [test_browserui.xul]
+skip-if = os == 'linux' && !debug # Bug1429575
 [test_counterstyle.html]
 [test_general.html]
 [test_general.xul]