# thunderbird

### How do I create sub-folders (nested folders) in Thunderbird?

Subfolders (nested folders) allow you to organize your mailboxes in multiple levels of folders. This can be helpful in sorting and managing large numbers of mailboxes.

When you use the New Folder... command in Thunderbird, by default it creates...

### How do I start Firefox or Thunderbird when it is stating that my 'profile is in use'?

With Netscape:
rm $HOME/.netscape/lock or rm ~/.netscape/lock For Mozilla: rm$HOME/.mozilla/*/*/lock or rm ~/.mozilla/*/*/lock
For Firefox:
rm $HOME/.mozilla/firefox/*/lock rm$HOME/.mozilla/firefox/*/...