Bump Firefox to latest, 66.0 (#352)

* Bump Firefox to 66.0

* Bump Firefox to latest, 66.0, via Sauce Labs

Dockerfile

@@ -11,7 +11,7 @@ RUN apt-get update \
   && apt-get install -y bzip2 curl firefox git python2.7 python-dev python3.6 python3-pip \
   && rm -rf /var/lib/apt/lists/*
 
-ENV FIREFOX_VERSION=65.0
+ENV FIREFOX_VERSION=66.0
 
 RUN curl -fsSLo /tmp/firefox.tar.bz2 https://download-installer.cdn.mozilla.net/pub/firefox/releases/$FIREFOX_VERSION/linux-x86_64/en-US/firefox-$FIREFOX_VERSION.tar.bz2 \
   && apt-get -y purge firefox \

Jenkinsfile

@@ -5,7 +5,7 @@ def branch = env.BRANCH_NAME ?: 'master'
 /** Desired capabilities */
 def capabilities = [
   browserName: 'Firefox',
-  version: '65.0',
+  version: '66.0',
   platform: 'Windows 10'
 ]