Tab groups saves automatically at closing last tab of theirs.

I would like to make Firefox web browser to '''save automatically''' the "tab group" created. The feature is already there by left clicking on the group and choose "save and close group". I would this to be automated as default behaviour at every attempt to close the last tab of the group, so the "tab group" never gets deleted by itself. Only deliberately left click on the tab group and choose "Delete group". Thank you in advance for your time reading this. 🙇