You can find the full version of the current Firefox release (65.0) in all languages and all operating systems here:

• https://www.mozilla.org/en-US/firefox/all/
• https://www.mozilla.org/en-US/firefox/65.0/releasenotes/

Best would be to create a new profile for Firefox 65 because profile used by Nightly might not be compatible.

• https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

how do i do that and keep all my setting and stored passwords and bookmarks please make this simple as possible for me . i do know how to do the basics and get where i need to mostly on a laptop

You can uninstall the Nightly build an install the current release.

You can copy files like these with Firefox closed to the current profile folder to recover specific data.

• bookmarks and history: places.sqlite
• bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder
• cookies.sqlite for the Cookies
• formhistory.sqlite for saved autocomplete Form Data
• logins.json (passwords) and key4.db (58+) or key3.db (57 and older) (decryption key) for Passwords saved in the Password Manager
  if you only have key3.db then make sure to remove an existing key4.db
• cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager
  if you only have cert8.db then make sure to remove an existing cert9.db
• persdict.dat for words you added to the spelling checker dictionary
• permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific data (Site Preferences)
• sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups folder)

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

• Help -> Troubleshooting Information -> Profile Directory:
  Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder
• http://kb.mozillazine.org/Profile_folder_-_Firefox

look i asked you to make it as easy as possible and you did the opposite. that makes no sense what so ever to me. that language you speak is impossible to understand really. i have nightly and want to go back to firefox cor-el Jan 29, 2019, 9:55:01 AM

You can uninstall the Nightly build an install the current release.

You can copy files like these with Firefox closed to the current profile folder to recover specific data.

   bookmarks and history: places.sqlite
   bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder
   cookies.sqlite for the Cookies
   formhistory.sqlite for saved autocomplete Form Data
   logins.json (passwords) and key4.db (58+) or key3.db (57 and older) (decryption key) for Passwords saved in the Password Manager
   if you only have key3.db then make sure to remove an existing key4.db
   cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager
   if you only have cert8.db then make sure to remove an existing cert9.db
   persdict.dat for words you added to the spelling checker dictionary
   permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific data (Site Preferences)
   sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups folder) 

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

   Help -> Troubleshooting Information -> Profile Directory:
   Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder
   http://kb.mozillazine.org/Profile_folder_-_Firefox 

Mark it as solved This doesn't solve my problem Browse for unsolved questions and help a Firefox use

It is not guaranteed that if you downgrade a profile used by an unstable alpha build to a release version. If you want to downgrade then you need to take the extra effort to set up a new profile using the Profile Manager.

• https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

You can copy some files from the Nightly profile to the new profile if you want to recover specific data.

How did you end up with a Nightly alpha Firefox build instead of the current release?