Kill Firefox after_script to avoid never ending "GConf-WARNING **: Th…

…e connection to DBus was broken." messages

.travis.yml

@@ -4,6 +4,8 @@ sudo: false
 cache:
   directories:
   - eggs
+addons:
+  firefox: latest-esr
 env:
 - PLONE_VERSION=4.3
 - PLONE_VERSION=5.0
@@ -25,5 +27,10 @@ after_success:
 - bin/createcoverage -t "--layer=!Robot"
 - pip install -q coveralls
 - coveralls
+after_script:
+# Firefox complains: GConf-WARNING **: Got Disconnected from DBus.
+# And then it keeps hanging, causing a failed job after 30-50 minutes.
+# So we just kill Firefox.
+- pkill -9 firefox
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