Put all $log errors in a global variable "errors" so you have a log of errors that happen before you have access to the console.

angular.app.store.errors.js

  angular
  .module('app', [])
  .config(['$provide', function ($provide) {
    window.errors = [];
    $provide.decorator('$log', ['$delegate', function ($delegate) {
      var origError = $delegate.error;

      $delegate.error = function () {
        window.errors.push(arguments);
        origError.apply(null, arguments);
      };

      return $delegate;
    }]);
  }])