diff --git a/packages/viewer/src/app.ts b/packages/viewer/src/app.ts
index 4dc6d61fb..922de3320 100644
--- a/packages/viewer/src/app.ts
+++ b/packages/viewer/src/app.ts
@@ -3,6 +3,15 @@ import { renderLatex } from './latex';
 import { renderMathML } from './mathml';
 import { bypassEncapsulation } from './retro';
 
+declare global {
+  interface Window {
+    viewer: {
+      properties: Properties,
+      isLoaded: boolean
+    };
+  }
+}
+
 // This should be the only code executed outside of a function
 // and the only code containing browser globals (e.g. window)
 // TODO try to set up the linter to check these two constraints
@@ -17,9 +26,12 @@ async function main(w: Window): Promise<void> {
   const properties: Properties = await Properties.generate();
 
   // Expose the globals to the browser
-  (w as any).viewer = {
-    properties,
-  };
+  if (!w.viewer) {
+    w.viewer = {
+      properties,
+      isLoaded: false,
+    };
+  }
 
   const document = w.document;
 
@@ -40,6 +52,11 @@ async function main(w: Window): Promise<void> {
   // Initial function to call once document is loaded
   // Renders formulas and sets observer
   const start = async () => {
+    // Check if the viewer is alredy loaded
+    if (w.viewer.isLoaded) return;
+
+    w.viewer.isLoaded = true;
+
     // First render
     properties.render();
 
diff --git a/packages/viewer/src/properties.ts b/packages/viewer/src/properties.ts
index 94221bb05..acc10c54d 100644
--- a/packages/viewer/src/properties.ts
+++ b/packages/viewer/src/properties.ts
@@ -66,7 +66,6 @@ export class Properties {
     const script: HTMLScriptElement = document.querySelector(`script[src*="${pluginName}"]`);
 
     if (!!script) {
-
       const pluginNamePosition: number = script.src.lastIndexOf(pluginName);
       const params: string = script.src.substring(pluginNamePosition + pluginName.length);
       const urlParams = new URLSearchParams(params);
@@ -86,9 +85,10 @@ export class Properties {
       if (urlParams.get('zoom') !== null && urlParams.get('zoom') !== undefined) {
         instance.config.zoom = +urlParams.get('zoom');
       }
-
     }
 
+    instance.checkServices();
+
     // Get backend parameters calling the configurationjson service
     try {
       instance.config.backendConfig = await configurationJson(
@@ -108,6 +108,24 @@ export class Properties {
     return instance;
   }
 
+  /**
+   * Check if is inside Integrations Services
+   * @deprecated This will be removed once the viewer uncouple from the integration services.
+   */
+  private checkServices(): void {
+    const path = ((document.currentScript as HTMLScriptElement).src);
+
+    if (path.includes('pluginwiris_engine')) {
+      // If the path includes pluginwiris_engine use Java Integrations Services
+      this.config.editorServicesRoot = path;
+      this.config.editorServicesExtension = '';
+    } else if (path.includes('integration/WIRISplugins')) {
+      // If the path includes 'integration/WIRISplugins' use PHP Integrations Services
+      this.config.editorServicesRoot = path;
+      this.config.editorServicesExtension = '.php';
+    }
+  }
+
   get editorServicesRoot(): string {
     return this.config.editorServicesRoot ||
       defaultValues.editorServicesRoot;