If nothing is selected then I would not expect it to copy or cut anything. I would consider it a bug if Thunderbird was copy/cut/ pasting stuff that was not selected.

Senario: If you selected some text in another email, document, webpage and used 'Ctrl+C' to copy Then in Thunderbird Write you want to paste it into a partially composed email, but accidentally used 'Ctrl+C' again. Realising the error you then use Ctrl+V. But now everything you copied has gone from the clipboard and instead it's now copied and pasted a load of text you didn't even select. That is a problem. It is not expected behaviour.

The above example is a typical problem you could encounter with Sublime Text and so they have provided a means of switching it off in the settings.

But that's just my opinion. You obviously have a different view. You could try asking for it as an 'enhancement' via the 'Bugzilla' forum.

• https://bugzilla.mozilla.org/home

Hi, realy appreciate your reply. Yes I understand the issue with overwriting clipboard, and here are my understanding

- since modern windows support multi-clipboard(WinKey+V), the problem is highly alleviated - since you mentioned it, maybe this feature can be optional(default OFF, while VSCode, Sublime is Default ON) - yes I will report to bugzilla, thank you for your advice

Thank you.

Also, to submit or request an idea, please post at https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird where they can be discussed, voted, and collected for review.

Thanks