msedgewebview2.exe browser flags docs missing extensions-related flags

[crunk1]

I'm debugging some flags passed to webview2, but I'm not seeing them here in the docs. I can't find
--embedded-browser-webview-enable-extension or --embedded-browser-webview=1. I'm guessing there might be more extensions flags as well, but without the docs, I don't know what they are.

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Document Details

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• ID: 457e9d55-223d-e992-7ad6-78feab7d264d
• Version Independent ID: 457e9d55-223d-e992-7ad6-78feab7d264d
• Content: WebView2 browser flags - Microsoft Edge Developer documentation
• Content Source: microsoft-edge/webview2/concepts/webview-features-flags.md
• Service: microsoft-edge
• Sub-service: webview
• GitHub Login: @MSEdgeTeam
• Microsoft Alias: msedgedevrel

AB#53004037

[mikehoffms]

@monica-ch
re:
https://learn.microsoft.com/en-us/microsoft-edge/webview2/concepts/webview-features-flags?tabs=dotnetcsharp#available-webview2-browser-flags
--embedded-browser-webview-enable-extension
--embedded-browser-webview=1

[crunk1]

@mikehoffms are there any other extension-related flags that are missing from the documentation?

[mikehoffms]

@monica-ch - that question is for you:
Are there any other extension-related flags that are missing from the documentation?
eg from https://learn.microsoft.com/en-us/microsoft-edge/webview2/concepts/webview-features-flags?tabs=dotnetcsharp#available-webview2-browser-flags

[mikehoffms]

@chetanpandey1266 - questions from https://github.com/crunk1 are for you:

1. Should https://learn.microsoft.com/en-us/microsoft-edge/webview2/concepts/webview-features-flags?tabs=dotnetcsharp#available-webview2-browser-flags add the flags:

   • embedded-browser-webview-enable-extension
   • embedded-browser-webview

2. Are there any other extension-related flags that should be added?

In the article, a Find on embedded-browser-webview gives 1 flag:

@captainbrosset for re-triage

[chetanpandey1266]

Can I please know the source of this flags? And why you intend to use it?
The reason they are not mentioned in the document linked above is because they are not browser feature flags but command line argument that hold some special meaning in webview2. For example, embedded-browser-webview=1 denotes that it is the browser process.

[crunk1]

Our company builds a browser extension that our clients use. Some of our clients have internal tools that use embedded WebView2. While trying to support them, we encountered those flags.

[chetanpandey1266]

I believe this is added as command line args for apps who have enabled extensions / using extensions. This is not something a developer have to add explicitly. If you need more help, I can provide the apis to enable and add extensions in webview2 applications.

[crunk1]

I understand that the flags are managed by libraries/SDKs, I was just hoping for more complete documentation to help us during debugging/inspection via Process Explorer.