Re: Thunderbird announcing 0 in the message list before subject line
If you're an NVDA user and a Thunderbird user who wants to deal with checking what columns are displayed and/or moving and/or removing same, installing the Mozilla Apps Enhancements Add-On and using its features to do so makes life much, much easier. See specifically the NVDA+H command at the very end of the page along with the CTRL+NVDA+1-9 command right above that.
Brian - Windows 10 Pro, 64-Bit, Version 2004, Build 19041
A gentleman is one who never hurts anyone's feelings unintentionally.
~ Oscar Wilde