Try:
- press the start button (Windows Vista, 7, 10) and enter
% Appdata% - confirm with enter. Alternatively, you can press the WIN + R key combination - the Windows flag and the R key - and enter% appdata% there).
- go to Mozilla -> Firefox
- In addition to the Profiles directory, there should also be a profiles file (described as a configuration settings file), double-click, the file should open in a notebook. If you have one profile in Firefox, the last lines of the file should look something like:
[Profile0]
Name=default
IsRelative=1
Path=Profiles/gh6xfpea.default
Remember the active profile from the last line, in this case gh6xfpea.default
- close the notebook, enter the Profiles directory. Is there only one directory (should then have the name read in the previous step), or are there more directories?
* If there is only one directory with the name consistent with that read from the notebook (if there are more, then the info is below):
- enter this directory
- find files
key3.db (it may have a hidden extension, then key3 will be the same) and
logins.json (again it may have a hidden extension and the name logins).
- right click on the first of them, select
Revert to previous versions - see what previous dates are available (if any are available), rate if firefox remembered the passwords you want to recover at any of these time points.
- do not restore yet, cancel.
- do the same for the second file. Compare whether the same dates are available as for the first file. Both files should be restored to the same date because they are quite closely related.
If earlier versions with a compatible date are available and you think that these passwords were still working then disable firefox (it's important), wait half a minute and restore both of these files to the selected date.
If earlier versions are not available (which may occur), this method cannot be used.
** if there are more directories with profiles:
- check the creation dates of these directories. Does the directory that was read from the notebook have any recent creation date? Then you can try to look in other profiles of saved passwords.
