diff --git a/backend/app.js b/backend/app.js
index d41c782..2a98860 100644
--- a/backend/app.js
+++ b/backend/app.js
@@ -585,6 +585,7 @@ app.post('/api/tomp3', function(req, res) {
 
     var customQualityConfiguration = req.body.customQualityConfiguration;
     var maxBitrate = req.body.maxBitrate;
+    var globalArgs = config_api.getConfigItem('ytdl_custom_args');
     var customArgs = req.body.customArgs;
     var customOutput = req.body.customOutput;
     var youtubeUsername = req.body.youtubeUsername;
@@ -621,6 +622,11 @@ app.post('/api/tomp3', function(req, res) {
         if (!useDefaultDownloadingAgent && customDownloadingAgent === 'aria2c') {
             downloadConfig.splice(0, 0, '--external-downloader', 'aria2c');
         }
+
+        if (globalArgs && globalArgs !== '') {
+            // adds global args
+            downloadConfig = downloadConfig.concat(globalArgs.split(' '));
+        }
     }
 
     youtubedl.exec(url, downloadConfig, {}, function(err, output) {
@@ -671,6 +677,7 @@ app.post('/api/tomp4', function(req, res) {
     var date = Date.now();
     var path = videoFolderPath;
     var videopath = '%(title)s';
+    var globalArgs = config_api.getConfigItem('ytdl_custom_args');
     var customArgs = req.body.customArgs;
     var customOutput = req.body.customOutput;
 
@@ -704,6 +711,11 @@ app.post('/api/tomp4', function(req, res) {
         if (!useDefaultDownloadingAgent && customDownloadingAgent === 'aria2c') {
             downloadConfig.splice(0, 0, '--external-downloader', 'aria2c');
         }
+
+        if (globalArgs && globalArgs !== '') {
+            // adds global args
+            downloadConfig = downloadConfig.concat(globalArgs.split(' '));
+        }
     }
 
     youtubedl.exec(url, downloadConfig, {}, function(err, output) {
diff --git a/backend/config.js b/backend/config.js
index 04ef5ca..f61d321 100644
--- a/backend/config.js
+++ b/backend/config.js
@@ -1,8 +1,9 @@
 const fs = require('fs');
 
 let CONFIG_ITEMS = require('./consts.js')['CONFIG_ITEMS'];
+const debugMode = process.env.YTDL_MODE === 'debug';
 
-let configPath = 'config/default.json';
+let configPath = debugMode ? '../src/assets/default.json' : 'config/default.json';
 
 // https://stackoverflow.com/questions/6491463/accessing-nested-javascript-objects-with-string-key
 Object.byString = function(o, s) {
diff --git a/src/app/main/main.component.ts b/src/app/main/main.component.ts
index 41c33f4..bc7b2be 100644
--- a/src/app/main/main.component.ts
+++ b/src/app/main/main.component.ts
@@ -801,8 +801,9 @@ export class MainComponent implements OnInit {
 
   getSimulatedOutput() {
     const customArgsExists = this.customArgsEnabled && this.customArgs;
+    const globalArgsExists = this.globalCustomArgs && this.globalCustomArgs !== '';
 
-    const full_string_array: string[] = [];
+    let full_string_array: string[] = [];
     const base_string_array = ['youtube-dl', this.url];
 
     if (customArgsExists) {
@@ -861,6 +862,10 @@ export class MainComponent implements OnInit {
       full_string_array.push(...additional_params);
     }
 
+    if (globalArgsExists) {
+      full_string_array = full_string_array.concat(this.globalCustomArgs.split(' '));
+    }
+
     this.simulatedOutput = full_string_array.join(' ');
     return this.simulatedOutput;
   }
diff --git a/src/app/settings/settings.component.html b/src/app/settings/settings.component.html
index 17ea080..6594c44 100644
--- a/src/app/settings/settings.component.html
+++ b/src/app/settings/settings.component.html
@@ -211,7 +211,7 @@
             </div>
             <div class="col-12">
                 <mat-form-field color="accent">
-                    <input [disabled]="!new_config['Advanced']['use_default_downloading_agent']" [(ngModel)]="new_config['Advanced']['custom_downloading_agent']" matInput placeholder="Custom agent" required>
+                    <input [disabled]="new_config['Advanced']['use_default_downloading_agent']" [(ngModel)]="new_config['Advanced']['custom_downloading_agent']" matInput placeholder="Custom agent" required>
                     <mat-hint></mat-hint>
                 </mat-form-field>
             </div>