Yes. See https://support.mozilla.org/en-US/kb/organize-your-messages-using-filters

Thanks Matt, answers my problem. BUT my virus software threw up a message regarding your link, see image attached

Yes I am actively trying to determine what is going on with this tracking. But no one from Mozilla has responded as yet. But it is something they are doing, why and if they should are still open questions. See https://support.mozilla.org/en-US/forums/contributors/717203?utm_campaign=forums-post&utm_source=notification&utm_medium=email#post-88528 and https://bugzilla.mozilla.org/show_bug.cgi?id=1941771