Flock and Firefox used to have a "Description" field for favorites. This was removed in Firefox 3/Flock 2 because it was not often used.

However, for online favorites this can be very valuable. To add this field back to the Favorites Properties dialog, do the following:

1. Type "about:config" (minus the quotation marks) into the address bar and hit enter
2. Click "I'll be careful, I promise!" (and please do be careful, there are some powerful options here that could potentially break your copy of Flock.
3. Paste"flock.favorites.show.description" into the Filter field
4. Double-click to change the value of this item to "true".

To export your favorites as a .html file:

1. Open the Favorites menu
2. Choose "Organize Favorites"
3. Open the "Import and Backup" menu
4. Click "Export HTML"
5. Choose a name and location for your .html file
6. Click "Save"

Ma.gnolia suffered a major outage and has shut it's doors, thus Flock no longer supports it as an online favorites service.

Firefox and Flock are built on the same basic code. Part of that code doesn't allow for the migration of favorites from other Mozilla browsers while the program is running. That stinks, we know. We would recommend that if you have favorites you would like to import from both Firefox and another browser that you import the Firefox Favorites in the initial setup, and then import your other browser's favorites later.
There is a workaround to this if you have already finished the first-run importer. Since Flock is built to manage favorites from social bookmarking sites like del.icio.us and Shadows, you can upload the favorites to the service of your choice from Firefox.