# on debian/ubuntu, if you need to discriminate between
# versions of firefox you can use
#   dpkg-query --show -f '${Version}\n' firefox
# to retrieve firefox version, set GEM_FIREFOX_VERSION
# with it and then choose the right variables set
#  
# export GEM_NATIVE_FIREFOX_VERSION=55.0b9
export GEM_NATIVE_FIREFOX_VERSION=68.0
export GEM_SELENIUM_VERSION=4.0.0
export GEM_GECKODRIVER_VERSION=0.30.0