What options are available to get a value that is associated to a key in yaml?
One could use go-yq if one wants to lookup a value by applying jq style, i.e. if firefox_version then one could look it up by adding a dot:


docker run -v ${PWD}:/ansible-firefox utrecht/go-yq:2.1.0 \
       .firefox_version /ansible-firefox/defaults/main.yml