Use the webpack externals configuration directive to prevent bundling any additional copies of Vue. This is basically to make sure the main menu doesn't misbehave.

Modules using vue may need to add the vue module to their load_requires now, as demonstrated in main_menu. If importing .vue files individually, this likely isn't necessary.

src/modules/main_menu/index.js

@@ -28,6 +28,8 @@ export default class MainMenu extends Module {
 		this.inject('site');
 		this.inject('vue');
 
+		this.load_requires = ['vue'];
+
 		//this.should_enable = true;
 
 		this._settings_tree = null;

src/utilities/vue.js

@@ -17,7 +17,7 @@ export class Vue extends Module {
 	}
 
 	async onLoad() {
-		const Vue = this.Vue = (await import(/* webpackChunkName: "vue" */ 'vue')).default,
+		const Vue = window.ffzVue = this.Vue = (await import(/* webpackChunkName: "vue" */ 'vue')).default,
 			components = this._components;
 
 		this.component((await import(/* webpackChunkName: "vue" */ 'src/std-components/index.js')).default);

webpack.common.js

@@ -16,6 +16,13 @@ module.exports = {
 			utilities: path.resolve(__dirname, 'src/utilities/')
 		}
 	},
+	externals: [
+		function(context, request, callback) {
+			if ( request === 'vue' && ! /utilities/.test(context) )
+				return callback(null, 'root ffzVue');
+			callback();
+		}
+	],
 	output: {
 		chunkFilename: '[name].[chunkhash].js',
 		path: path.resolve(__dirname, 'dist'),