Update config for running download tests on CI

scripts/bin/run-integration-test-circleci.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -ex
+
+GECKODRIVER_URL=$(
+  curl -s 'https://api.github.com/repos/mozilla/geckodriver/releases/latest' |
+  python -c "import sys, json; r = json.load(sys.stdin); print([a for a in r['assets'] if 'linux64' in a['name']][0]['browser_download_url']);"
+);
+
+
+curl -L -o geckodriver.tar.gz $GECKODRIVER_URL
+gunzip -c geckodriver.tar.gz | tar xopf -
+chmod +x geckodriver
+sudo mv geckodriver /bin
+geckodriver --version
+# Install pip
+sudo apt-get install python-pip
+sudo pip install --upgrade pip
+
+sudo pip install mozdownload mozinstall==1.15
+
+mkdir -p ~/project/firefox-downloads/
+find  ~/project/firefox-downloads/ -type f -mtime +90 -delete
+mozdownload --version latest --type daily --destination ~/project/firefox-downloads/firefox_nightly/
+
+export PATH=~/project/firefox:$PATH
+mozinstall $(ls -t firefox-downloads/firefox_nightly/*.tar.bz2 | head -1)
+firefox --version
+ npm run circleci-test-integration