How do I open the profile manager using windows 7?

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. '''Warning ! !''' Only '''Copy''' the files you are told. We will avoid anything that might cause you 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. +++++++++++++++++++++++++++++++++++++++++++++++++ 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. cert8.db: Stores all your security certificate settings and any SSL certificates you have imported into Firefox. If removed, the file will be replaced. +++++++++++++++++++++++++++++++++++++++++++++++++ '''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.

'''Make sure Firefox is closed first before trying to start with Profilemanager.''' https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles#w_starting-the-profile-manager