Yes,

You need to acces your old profile in the old hard drive:

• Finding your profile without opening Firefox

Try do the instructions of the help article above but in the old drive Then try go to bookmarks folder and get a backup .json file

or

• Your important data and their files

Try transfer your old places.sqlite to your new profile:

• Copying files between profile folders

step 1. click on bookmark follow screenshot

when I do it your way I see the new 27 version of firefox bookmarks....when I last saw my old one it was still 26 on the D drive. I clicked on it and now its gone from the folder I have posted. this is all thats posted in the folder maybe it's in there?

This folder is the installation folder.

First unhide files and folder:

• http://www.youtube.com/watch?v=xUfjt6xqG_Y

Then access the old profile folder: "Old Drive":\Users\"username"\Application Data\Mozilla\Firefox\Profiles Click on the profile with “default” in the name to open it in a window.

In this folder you will find the bookmarks folder and the places.sqlite file

that helped me find the old ones, from there I was able to join it with the new fire fox. Thanks for the help!