# 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=3.141.0 export GEM_GECKODRIVER_VERSION=0.32.0