I would recommend to check with their FAQ game saves.

You can do a test and create a new profile with the Profile Manager and copy the content of this specific storage folder to the new profile once this folder has been created again to see if that picks up this data. I don't know if it is possible to backup this data otherwise.

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

As a footnote to the above, the data is most likely under:

[profile folder]\storage\default\website

More info on profiles: Profiles - Where Firefox stores your bookmarks, passwords and other user data

jscher2000 said

As a footnote to the above, the data is most likely under: [profile folder]\storage\default\website

It does not seem to be. For test, I created three pieces of data for this page in Local Storage: "Test", "Test 2" and "Test 3". Then I deleted this folder that you mentioned. But those test data are still there.

What does the Storage Inspector show?

• https://developer.mozilla.org/en-US/Tools/Storage_Inspector

Some DOM storage pieces are in the webappsstore.sqlite file. It's a bit difficult to search due to the reversed host names.

cor-el said

What does the Storage Inspector show?

See the attachment. Of course, the web game's storage has a great deal more keys containing my character names, their traits and a lot of embarrassing details I won't be posting here. The web game adds cryptographic hash to the data, so they cannot be changed.

jscher2000 said

Some DOM storage pieces are in the webappsstore.sqlite file. It's a bit difficult to search due to the reversed host names.

Found them. They were in the webappsstore.sqlite file. Copying this file over to a new profile creates the saved games. I used DB Browser to modify this file as was necessary.

Thanks