Removing firefox since it's not working and karma is deprecated

Author: rustedgrail

karma.conf.js

@@ -58,7 +58,7 @@ module.exports = function(config) {
 
     // start these browsers
     // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
-    browsers: ['Chrome', 'Firefox'],
+    browsers: ['Chrome'],
 
 
     // Continuous Integration mode

karma.core.conf.js

@@ -58,7 +58,7 @@ module.exports = function(config) {
 
     // start these browsers
     // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
-    browsers: ['Chrome', 'Firefox'],
+    browsers: ['Chrome'],
 
 
     // Continuous Integration mode

package-lock.json

@@ -32,7 +32,6 @@
     "jshint-stylish": "2.2.1",
     "karma": "6.4.1",
     "karma-chrome-launcher": "3.1.0",
-    "karma-firefox-launcher": "1.3.0",
     "karma-mocha": "2.0.1",
     "karma-requirejs": "1.1.0",
     "karma-safari-launcher": "1.0.0",