Network details doesn't display custom content-type body

[mrak]

Our web app uses json with content-type: application/vendor.corporation.com+json to communicate between client/server.

This custom content-type is merely plain-text, properly formatted json. The Network details, however, just says:

Unable to show data of type application/vendor.corporation.com+json

Please show plain-text content/post bodies when possible, or allow a "Show me anyway" option.

This may be related to issue #152