Your Netscape 6 or 7 profiles will be available to Mozilla. However, sharing profiles between Netscape 6 or 7 and Mozilla can cause problems.
Mozilla automatically uses your Netscape profile unless you have multiple profiles, in which case Mozilla prompts you to choose a profile. To avoid accidentally opening Mozilla with your Netscape profile, create a new, extra profile using your Netscape’s Profile Manager before installing Mozilla.
It is worth repeating that you should not share profiles between Mozilla and Netscape 6 or 7.
AOL Mail and Netscape WebMail
You can use Mozilla's mail client to access AOL Mail. To set up your AOL account on Mozilla Mail & Newsgroups, create a IMAP mail account, set the incoming server to imap.aol.com, and set the outgoing server to smtp.aol.com. For accounts with AOL outside of
Netscape 6 and 7 has Netscape WebMail integrated into its mail client. Mozilla does not have such integration, but you can access Netscape WebMail via the Web at http://webmail.netscape.com.
Importing user data from AOL
Mozilla cannot import data from AOL directly. To import mail saved on your computer (Filing Cabinet) and addresses from AOL, you must use third-party utilities to export your data in formats Mozilla can import. You may try the utilities listed in:
http://www.emailman.com/conversion/
(mozilla.org does not recommend or support any software listed on the Web page.)
For general instructions on importing mail and addresses, read Migrating from another mail client.
Migrating from Microsoft Internet Explorer
Migrating from Microsoft Internet Explorer is easy. Mozilla automatically imports your Internet Explorer Favorites. To access them, open the Bookmarks menu and select Imported IE Favorites.
Synchronizing your favorites and bookmarks manually
Mozilla automatically imports your favorites only once. If you have changed your favorites, you can re-import your favorites manually.
First, you need to export your favorites in HTML format. On Mac OS,
1. Open Internet Explorer.
2. Open the Favorites menu and select Organize Favorites.
3. Open the File menu and select Export Favorites.
4. In the dialog that appears, save the file.
On Windows, to export your favorites,
1. Open Internet Explorer.
2. Open the File menu and select Import and Export.
3. Follow the instructions in the wizard that appears to save your favorites to a file.
To import your favorites to Mozilla,
1. Open Mozilla. In Mozilla Navigator, open the Bookmarks menu and choose Manage Bookmarks.
2. In the Bookmarks Manager, open the Tools menu and choose Import.
3. Open the HTML file you just saved in the file picker.
Migrating from Microsoft Outlook or Outlook Express
To import your old mail settings, mail, and addresses:
1. Open Mozilla Mail & Newsgroups: open the Window menu and choose Mail & Newsgroups.
2. In Mozilla Mail & Newsgroups, open the Tools menu and choose Import.
3. Following the instruction of the Import dialog.
Note: importing settings, mail, and addresses from Microsoft Outlook or Outlook Express requires that the program is still installed on your computer. You may uninstall Outlook or Outlook Express afterwards.
Note: Mozilla does not support special characters (e.g. / and #) in mail folders. If you receive the following error: Unable to import mailboxes, cannot create proxy object for destination mailboxes, then open Outlook (or Outlook Express) and rename your folders. Then try importing again.
Source- www.mozilla.org