Comment 11 for bug 306438

Once again I've accidentally deleted an address card and can not recover it.
I find it odd that if I close a browser window with multiple tabs or move a mail
folder to the trash folder, I receive a warning dialog box. In all the
situations mentioned, the information can be easily retrieved through the
history or going to the trash folder.
It does not make sense to me that data so is easily retrievable like a recently
visited website or a mail folder moved to trash are given warnings prompts but
data requiring much more effort to recover is not given a simple warning.

I suggest a prompt similar to the warning when a multi-tabbed window is closed
be added to the address book. This prompt would appear when deleting address
cards or address lists. If a person decides he/she no longer wishes to see the
prompt, it can be disabled. This solution clearly informs someone that the
information will be permanently lost and seems much simpler than implementing
undo/redo options.