Changes

=== Avast caused slowness and errors regarding nsemail.HTML ===The release of Avast 10.3.2223 ( We think it is that version) has resulted in issues with avasts preventing Thunderbird from functioning correctly. The workaround appears to be to create an exception in avast for the file nsemail.html in your computers temp folder. I have to say "appears to be" as Avast have not yet replied to my email. [https://forum.avast.com/index.php?topic=174203.msg1237332#msg1237332 ], [https://forum.avast.com/index.php?topic=174392.msg1238419#msg1238419 ], [https://forum.avast.com/index.php?topic=78428.msg1236530#msg1236530 ], [https://forum.avast.com/index.php?topic=174153.msg1237802#msg1237802 ], [https://forum.avast.com/index.php?topic=174153.msg1237802#msg1237802 ], [https://forum.avast.com/index.php?topic=174140.msg1237521#msg1237521 ] SUMO links [https://support.mozilla.org/en-US/questions/1068609 ], [https://support.mozilla.org/en-US/questions/1075713]