Why Immersive reader F9 only work on Edge community?

[GatesLover]

F9 immersive mode seems not adapt to other websites

[#2]

@GatesLoverDoes this happen in Google Chrome with the extension?

[#3]

@Kam 

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@Kam wrote:
@GatesLoverDoes this happen in Google Chrome?

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what does it have anything to do with Chrome!? they can have their own set of shortcuts

[#4]

@GatesLover 

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@GatesLover wrote:

F9 immersive mode seems not adapt to other websites

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Because the F9 shortcut only applies to this button that sometimes appears in the address bar

there are more websites that are designed in a way that the Immersive reader button appears there, like this

https://blogs.windows.com/windows-insider/2020/12/03/announcing-windows-10-insider-preview-build-202...

so if you don't see the button in the address bar, that means F9 button won't work.

[#5]

@HotCakeX Why can't we apply it to all websites?

[#6]

You can apply it to any text if you highlight it, right-click and select "open in immersive reader",

but the Immersive Reader button works only on websites that support the feature.

[#7]

So can we make F9 available while "open in immersive reader" appears in right-click menu ?
Or just makes F9 the global shortcut which force the browser enter the immersive reader mode? As we cannot set F9 in other extensions and apps to avoid hotkey collision.