Log CSP reports from Firefox
Log CSP reports from Firefox

Firefox sends CSP reports with mime type application/json. Remove unused variable.

rwjblue/ember-cli-content-security-policy,rwjblue/ember-cli-content-security-policy,givanse/ember-cli-content-security-policy,bttf/ember-cli-content-security-policy,bttf/ember-cli-content-security-policy,givanse/ember-cli-content-security-policy