You should contact their support on how to use their software or how to integrate with Firefox browser since that isn't a Mozilla product.

Hi @markwarner22 The problem is on the Firefox Settings side. As I explained, and provided a link to, VSCS have provided a good indication of what the issue is and (on other browsers) how to solve it. My question was/is how to achieve that on Firefox...

Firefox 127 added support for the clipboard.read() method used in other browsers; I think this was previously restricted to add-ons.

As an example of how it should work: https://developer.mozilla.org/en-US/docs/Web/API/Clipboard/read#result_2

Firefox 127+ does not present a permission prompt, but there needs to be a direct connection between the user action triggering the clipboard read and the read itself; if there are hoops in between, permission maybe silently denied. https://developer.mozilla.org/en-US/docs/Web/API/Clipboard_API#security_considerations

Since browsers work differently, it's possible that websites which previously had special handling for Firefox will need to update to specially handle this change. However, I'm just guessing.

I don't know if there is a preference to roll back the Firefox 127 change.

Hi @jscher2000 , and thank you for your helpful response. However, I'm not sure exactly what you're advising me that I need to do? When I try your "Clipboard_API#security_considerations " test in Firefox (133.0.3 64bit), it responds "Error: Clipboard read operation is not allowed.". Since, I've also found I get the same "cannot copy from clipboard" error in VSC when in MS Edge browser. So, are you saying... a) The problem is on the Firefox side, and there's nothing I can do? b) The problem is on the VSC server side, and I need them to fix it? c) The problem is in Home Assistant, and I need them to update their VSC version or maybe change it's config in HA so it works on Firefox (and Edge)?

Best regards, Ian

When I try your "Clipboard_API#security_considerations " test in Firefox (133.0.3 64bit), it responds "Error: Clipboard read operation is not allowed.".

Thank you for testing that. When I test in a cleaner (less customized) profile, I noticed there is a Paste button when the copied material originated outside the little test frame (screenshot attached):

If I don't use that Paste button, then I get the error you mentioned. Not sure whether you see that button anywhere on the VS Code site.