document.execCommand(‘cut’/‘copy’) was denied because it was not called from inside a short running user-generated event handler.

[ghost]

I tried to use copy/pasted the code inside file 'youtube-subscriptions-exporter.js' into the Developer Tools console in firefox on a linux (ubuntu 20.04) and got the error : document.execCommand(‘cut’/‘copy’) was denied because it was not called from inside a short running user-generated event handler.

The pop-up window with the following message appeared : Subscriptions have been successfully copied to the clipboard. Nevertheless, the data was not in the clipboard.

Very cool project ! Thanks for your work.