code: function load() {
  	let r;
  	try {
  		r = exports.storage.getItem('debug');
  	} catch (error) {
  		// Swallow
  		// XXX (@Qix-) should we be logging these?
  	}
  
  	// If debug isn't set in LS, and we're in Electron, try to load $DEBUG
  	if (!r && typeof process !== 'undefined' && 'env' in process) {
  		r = process.env.DEBUG;
  	}
  
  	return r;
  }
docs: Load `namespaces`.
  
  @return {String} returns the previously persisted debug modes
  @api private