https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data

https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer

https://support.mozilla.org/en-US/kb/import-bookmarks-html-file

https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

https://support.mozilla.org/en-US/kb/recover-lost-or-missing-bookmarks

https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

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

Please let us know if this solved your issue or if need further assistance.

Thanks for your quick answer, I have already read your links they give help to access to information stored locally into my profile directory, and it's not the purpose of my question : I want to know where in the cloud or in the internet Firefox is storing my data ? And is there an other way to access it than using Firefox ?

Hi

If you mean Firefox Sync, this is a secure service utilising cloud servers and as with other online services from Mozilla is covered by our privacy notice (https://www.mozilla.org/en-US/privacy/firefox/).

Data stored on the Sync server can only be accessed via Firefox because this data is encrypted locally and needs to be decripted

You can setup your own Sync server though.

• http://mozilla-services.readthedocs.io/en/latest/index.html