"nomerge" behavior not working in MsEdge browser v93 with IE Mode

Vivek Ramesh 86

Hi All,

I try to prevent session sharing between different windows/tabs of Edge browser v93 (latest version).

1) I'm using "-nomerge" in VBScript to launch my application as below

AppToLaunch = "msedge -nomerge --new-window --app=" & "http://servername/index.aspx"

dim WshShell
set WshShell = WScript.CreateObject("WScript.Shell")
WshShell.Run AppToLaunch

2) I have done some settings to launch my application in IE Mode when I opened it via VBScript or Entering URL in Edge browser

3) Configured the below setting in the integrated site list manager tool available at "edge://compat/sitelistmanager"

<site-list version="x">
<site url="http://serverName/index.aspx">
<compat-mode>IE11</compat-mode>
<open-in merge-type="no-merge">IE11</open-in>
</site>
</site-list>

Still, the sessions between different tabs/windows are getting merged in the Edge browser. Could anyone please help me to resolve this?

Thanks in advance,

Yu Zhou-MSFT 12,071 Reputation points Microsoft Vendor

2021-09-23T07:48:25.017+00:00

Hi @Vivek Ramesh

From the doc, the command line for no-merge mode should be --enable-features=msAllowNoMergeIEMode.
Have you tried to use this in your VBScript to launch Edge? You can try to use this and tell us about your test result.
Vivek Ramesh 86 Reputation points

2021-09-23T09:18:03.963+00:00
Hi @Yu Zhou-MSFT ,

Thanks for your response.

Since I'm using the MSEdge v93, I haven't used --enable-features=msAllowNoMergeIEMode.

As per your suggestion, I have updated the VBScript as below

AppToLaunch = "msedge --new-window --enable-features=msAllowNoMergeIEMode --app=" & "http://servername/index.aspx"

but there is no change in the result. Still, I'm facing the same issue
Yu Zhou-MSFT 12,071 Reputation points Microsoft Vendor

2021-09-28T10:06:33.167+00:00

Hi @Vivek Ramesh

I followed the steps in the doc and test with Edge version 94.0.992.31, the no-merge mode works fine.
Have you enabled IE mode first using group policies? I tested and found that we need to enable IE mode according to this doc, otherwise no-merge mode won't work in IE mode.
Besides, please pay attention that no-merge mode only works in different IE mode windows, it won't work between tabs.