For example, the “Install” button changes to “Remove” for
https://addons.mozilla.org/firefox/addon/noscript/
which is Enabled, and to “Enable” for
https://addons.mozilla.org/firefox/addon/open-link-with-new-tab/
which is Disabled.
I knew that installed add-on information was sent when using the “Get Add-ons” panel of the Add-ons page (discovery.addons.mozilla.org), but this seems like a new behavior.
Is it locked down to AMO only?