Bug 1310128 - Enable debug output for initial safebrowsing test. r=francois

MozReview-Commit-ID: 40kAK2zYJ4Q

--HG--
extra : rebase_source : f110c43af8d3e1c642c762f96cd4138804a957f2

testing/firefox-ui/tests/functional/security/test_safe_browsing_initial_download.py

@@ -32,6 +32,7 @@ class TestSafeBrowsingInitialDownload(FirefoxTestCase):
     }
 
     prefs_safebrowsing = {
+        'browser.safebrowsing.debug': True,
         'browser.safebrowsing.blockedURIs.enabled': True,
         'browser.safebrowsing.downloads.enabled': True,
         'browser.safebrowsing.phishing.enabled': True,