To configure git-open you may need to set some git config options. You can use --global to set across all repositories, instead of just the current one.

git config [--global] option value

Configuring which remote to open

If there is only one remote, git-open always opens that.

Otherwise git-open opens the remote named origin, but you may want to override this behavior.

When you fork a project and add a remote named upstream you often want that upstream to be opened rather than your fork. To accomplish this, you can set the open.default.remote within your project:

git config open.default.remote upstream