No, Pocket I believe is using the Reading list, the bookmarks did not merge for me. But yes it does ask you to log into Firefox sync in order to add the pocket extension functionality in Firefox.

If you are worried, you can still back it up: Back up and restore information in Firefox profiles

Thanks, but I wanted to know if I have to login into pocket with my pocket account or my firefox account in order to see the "View Pocket List" option in my bookmarks menu.