Upgrade Firefox version.

playbooks/roles/browsers/defaults/main.yml

@@ -13,7 +13,7 @@ browser_deb_pkgs:
 # which often causes spurious acceptance test failures.
 browser_s3_deb_pkgs:
     - { name: "google-chrome-stable_30.0.1599.114-1_amd64.deb", url: "https://s3.amazonaws.com/vagrant.testeng.edx.org/google-chrome-stable_30.0.1599.114-1_amd64.deb" }
-    - { name: "firefox_28.0+build2-0ubuntu0.12.04.1_amd64.deb", url: "https://s3.amazonaws.com/vagrant.testeng.edx.org/firefox_28.0%2Bbuild2-0ubuntu0.12.04.1_amd64.deb" }
+    - { name: "firefox-mozilla-build_42.0-0ubuntu1_amd64.deb", url: "https://s3.amazonaws.com/vagrant.testeng.edx.org/firefox-mozilla-build_42.0-0ubuntu1_amd64.deb" }
 
 # Chrome and ChromeDriver
 chromedriver_version: 2.6

playbooks/roles/jenkins_worker/tasks/test_platform_worker.yml

@@ -23,7 +23,7 @@
   register: firefox_version
 - assert:
     that:
-      - "'28.0' in firefox_version.stdout"
+      - "'42.0' in firefox_version.stdout"
 
 # Verify the virtualenv tar is newly-built
 - name: Get info on virtualenv tar