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The operating system is Win7.

First; open your file browser to the New profile;

Type about:support in the address bar and press enter.

Under the page logo on the left side you will see Application Basics. Under this find Profile Folder. To it’s right press the button Show Folder. This will open your file browser to the current Firefox profile. Now Close Firefox.

Second, open the file browser to the Old profile on the old drive.

Warning ! ! Only Copy the files you are told. We will avoid anything that might be the cause of problems. Here is the list of files;

cookies: Do not bother. Cookies will be created when you return to the web site. However, you will have to log in everywhere.

extensions(add-ons): it would be better to download them fresh.

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key3.db and logins.json: These are the Password files.

persdict.dat: custom dictionary – words you added to the dictionary

mimeTypes.rdf: What to do with what type of file.

places.sqlite: History and Bookmarks.

prefs.js: Your settings. Note, this may be contaminated.

Copy these files from the old to the new. You will get a message about the files already exist. Choose to over-write for each file.

You can find the profile folder in this hidden location:

• C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile>\

"AppData" (XP: Application Data; Mac: ~/Library; Linux: ~/.mozilla) is a hidden folder.

• http://kb.mozillazine.org/Show_hidden_files_and_folders

See also:

• https://support.mozilla.org/kb/Recovering+important+data+from+an+old+profile
• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

It is usually best not to copy the full profile folder, but only restore files with personal data that you really need. You can transfer files like these from the profile on the other computer.

• bookmarks/history: backups in the bookmarkbackups folder and possibly places.sqlite if you really need the history
• other SQLite files like cookies.sqlite (cookies) and formhistory.sqlite (saved form data)
• logins.json and key3.db for the passwords in the password manager
• permissions.sqlite and possibly content-prefs.sqlite for the Permissions and Site Preferences
• cert8.db for stored intermediate certificates
• sessionstore.js for open tabs and pinned tabs and tab groups