Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

To clarify a previous question...most of my address book seems intact but several groupings(lists) have disappeared. Why?

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by Matt

more options

My Thunderbird address book seems to still have most contacts in it...but several groups (lists) have gone missing. Why would that be? I haven't used the groups for quite some time and since i last used them, I updated to Windows 10 (not a clean upgrade but most things seem to be working properly). It seems odd that most addresses are still there, including some groups...but others have disappeared.

My Thunderbird address book seems to still have most contacts in it...but several groups (lists) have gone missing. Why would that be? I haven't used the groups for quite some time and since i last used them, I updated to Windows 10 (not a clean upgrade but most things seem to be working properly). It seems odd that most addresses are still there, including some groups...but others have disappeared.

All Replies (1)

more options

Answering that question is a bit like answering the question The clouds out my window are grey. What does that mean?

I would guess perhaps corruption. Or accidental deletion, possibly out lost the address book on update and through sending replies your collected addresses have basically repopulated it. Really I have no more idea than you. All I can do is guess and postulate.