DOM Storage provides two different types of storage, which form part of Web Hosting Australia: local and session storage. They vary in scope and duration. Data that is stored locally, Local Shared Objects (LSO), is linked to a domain and remains there even after the browser is closed. All scripts on a domain, from which the data was stored, can access the data.
In Mozilla Firefox, the data is stored in the database file. The SQLite3 file can be viewed using a suitable program. There are browser add-ons that are needed for the purpose that you can delete this information from your system again, some are automated, eg with Better Privacy.
By entering about: config in the address bar, the value of dom storage can changed to false from true, and DOM Storage objects are thus switched off. Session specific data is associated with the browser window.