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When a Firefox extension tries to make use of native messaging, my system opens a popup that reads:

Allow Firefox Web Browser to start WebExtension backend?

Firefox Web Browser is requesting to launch "[native application description]" ([native application name]).

This permission can be changed at any time from the privacy settings.

OK Cancel

Where do I find the referenced privacy settings? This question mentions “System Settings > Security & Privacy,” but I don’t have that – is it a GNOME thing? (Even if it is, I still need to be able to revoke the permission somewhere.) I’m using Kubuntu 22.04.

Ground
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  • Since Firefox issued the message, it's talking about firefox's "Privacy settings". – waltinator Jul 22 '23 at 14:12
  • Or probably about the settings of the extension itself. – mook765 Jul 22 '23 at 14:20
  • @mook765 I wrote the extension and it has no such settings. – Ground Jul 22 '23 at 16:37
  • @waltinator I don’t think Firefox would call itself “Firefox Web Browser” (rather than just “Firefox”) – it seems more like the system inserted the full name of the application there. I also haven’t found anything in Firefox’s settings. – And the popup uses the KDE icon and its title bar reads: “Allow Firefox Web Browser to start WebExtension backend? — Portal” (Where would I upload the screenshot?) – Ground Jul 22 '23 at 16:48

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