I don't know if any of you have the problem of occasionally clicking a column header and resorting your emails. I have mine set to have the newest right at the top, so I occasionally click it. Then I have to reset it to the way I like it. I found an add-on to stop this. It is a little different than the normal add-ons. It is called MailTweak and is available here
. There are 41 separate tweaks available in this one add on.