This docker images is used for testing Chrome, Firefox and running other tasks on Taskcluster. When any of the files in this directory change, the images must be updated as well. To do this, assuming you have docker installed:

In this directory, run

docker build -t <tag> .
docker push <tag>

Then update the image specified in the project's .taskcluster.yml file.

To update the image used for WebKitGTK:

docker build -f Dockerfile.webkitgtk -t <tag> .
docker push <tag>