Citrix Workspace App for HTML5 - Tech Preview. We do not currently have an Early access release available. We will have another soon. Support Resources. Applications and Published Desktops launched with HTML5 client might fail. Users see 'Error: Citrix Workspace app cannot launch app'. Users might briefly see the 'Connection Interrupted' flashcard. Administrators troubleshooting the issue may detect that the server suffered a BSOD and restarted. This article provides detailed steps on how to configure Google Chrome to use the full Citrix Receiver client, rather than the Lite client (HTML5). Under some circumstances, Chrome may revert to using the Lite client and this article will help you to switch to the full client experience.

Applicable Products

• Citrix Workspace App

Symptoms or Error

This article is intended for Citrix administrators and technical teams only.
Non-admin users must contact their company’s Help Desk/IT support team and can refer to CTX297149 for more information.
When using StoreFront with or without Workspace App for HTML5 through an HTTPS URL, applications and desktops cannot be started. The following error message is displayed:

“Cannot create a secure connection in this browser. Refer to the Citrix Knowledge Center article CTX134123.”

Solution

Recommended Solution(s) for All Browsers

• Connect via Citrix Gateway even for internal connections. This would ensure connections work fine regardless of Virtual Apps or Desktops versions.
  Deploying SSL/TLS for each Virtual Delivery Agent (VDA) for direct connections. Workspace App for HTML5 supports secure direct SSL/TLS connections with XenApp/XenDesktop 7.6
  

Read the following articles from the Citrix Blog for more information:

Mozilla Firefox

There is a possible workaround for Mozilla Firefox browser.

Note: This workaround has security implications; consult the security specialist of your organization to consider the following configuration.

1. Enforce secure communications between Workspace App for HTML5 and applications or desktops (for example, using IPSec).

2. Use Mozilla Firefox only for Citrix Receiver for HTML5 (not for general website use).

3. Enforce a secure configuration for Firefox.

4. Enable the Firefox network.websocket.allowInsecureFromHTTPS option.

1. Open a new tab in the Firefox browser.

2. Type about:config in the address bar.

3. Double-click network.websocket.allowInsecureFromHTTPS and set the value to true.

Note: This Firefox option might not be supported in Citrix Receiver for HTML5 future versions.

WARNING! This option on Firefox affects the operation of entire Firefox, not just Citrix Receiver for HTML5.

Important Note

As of version 9, Safari browser allows insecure web socket connections. Internet Explorer never allowed non SSL/TLS web socket connections from HTTPS websites. Chrome used to allow it behind a flag, but after the Chrome 44 update, this is no longer supported. Firefox allows it behind a flag (as explained earlier in this article), but it is not recommended. Going forward, only secure (SSL/TLS) web socket connections can be made from Receiver for HTML5.

Problem Cause

When Workspace App for HTML5 is hosted on a https site (default and recommended), non SSL/TLS websocket connections are prohibited by browsers.
In explaining the technical reason behind this it is important to understand the following two principles:
1. As opposed to existing as a separate process, Citrix Workspace App for HTML5 operates within the frame and process space of the browser itself. As such the browser has the ability to enforce certain security parameters.

This second point is less obvious in the case of Citrix Workspace App for HTML5 because the published desktop or application displays within the browser frame and “appears” to be connected via the Storefront server. Despite this appearance though, the underlying TCP/UDP connection is still between the client and the VDA. If the Storefront base URL is SSL enabled (where it begins with https as is best practice) and the VDA is not SSL enabled (which it is not by default) the browser in this case will prevent the connection due to what it sees as an underlying inconsistency. The inconsistency is that while the URL shown in the browser frame is prefixed with https, the actual underlying connection is not https even though it is not obvious to the user.
There are two solutions for this.
Solution 1 is to enable SSL on the VDA using the following guide:

Citrix Workspace App For Html5 Chrome

Additional Resources

This article will outline how to log in, and use citrix all from within a browser.

• Citrix Receiver and Citrix Workspace are the same thing. Citrix changed the name from Receiver to Workspace.
• Light Version means Citrix Workspace for HTML5
• Citrix Workspace for HTML5 means desktops and apps launch in your browser using a new tab (like a webpage)
• When using Citrix Workspace for HTML5, you cannot pass USB devices (Flash Drives, Webcams, or Printers) to the virtual application or desktop.
• Citrix Workspace App for HTML5 won't feel as smooth as Citrix Workspace for Windows/Mac when interacting with a virtual desktop or application.

• Apple Safari 7 or later
• Google Chrome 50 or later
• Microsoft Edge
• Microsoft Internet Explorer 11
• Mozilla Firefox 35 or later

Citrix Html5 Client