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Learn more about your Firefox data within your profile such as bookmarks, history and passwords.

Check out the table below to understand your Firefox data within your profile, what it means, and where you can read more information. {| !File !File type !Definition !More details |- |places.sqlite |Bookmarks, downloads, and browsing history |It contains all your Firefox bookmarks and lists of files you have downloaded and of websites you have previously visited. |[https://support.mozilla.org/en-US/kb/bookmarks-firefox Bookmarks in Firefox] |- |favicons.sqlite |Bookmarks, downloads, and browsing history |It stores website favicon images. Use it when recovering the places.sqlite file. |[https://support.mozilla.org/en-US/kb/bookmarks-firefox Bookmarks in Firefox] |- |key4.db |Passwords |It stores your key database for your passwords. To transfer saved passwords, you must copy this file along with the following file. |[https://support.mozilla.org/en-US/kb/password-manager-remember-delete-edit-logins Password Manager - Remember, delete and edit logins and passwords in Firefox] |- |logins.json |Passwords |Encrypted information about your saved usernames and passwords. |[https://support.mozilla.org/en-US/kb/password-manager-remember-delete-edit-logins Password Manager - Remember, delete and edit logins and passwords in Firefox] |- |permissions.sqlite |Site-specific preferences |It stores many of your Firefox permissions that are decided on a per-site basis. For example, it stores which sites are allowed to, or blocked from, setting cookies, installing extensions, displaying popups, etc. |[https://support.mozilla.org/en-US/kb/site-permissions-panel Site permissions] |- |search.json.mozlz4 |Search engines |It stores user-installed search engines. |[https://support.mozilla.org/en-US/kb/add-or-remove-search-engine-firefox Add or remove a search engine in Firefox] |- |persdict.dat |Personal dictionary |It stores any custom words you have added to Firefox's dictionary. If you have never added a custom word to the Firefox dictionary, then you will not have this file. |[https://support.mozilla.org/en-US/kb/how-do-i-use-firefox-spell-checker How do I use the Firefox spell checker?] |- |formhistory.sqlite |Autocomplete history |It remembers what you have searched for in the Firefox search bar and what information you have entered into forms on websites. |[https://support.mozilla.org/en-US/kb/control-whether-firefox-automatically-fills-forms Control whether Firefox automatically fills in forms] |- |cookies.sqlite |Cookies |Cookies are used by websites for a variety of reasons, some of which include keeping you logged in to a website you have previously logged in to, remembering any preferences a website has allowed you to set, authenticating you as a person who has visited a specific website before, etc. |[https://support.mozilla.org/en-US/kb/cookies-information-websites-store-on-your-computer Cookies] |- |cert9.db |Security certificate settings |It stores all your security certificate settings and any secure website certificates you have imported into Firefox. |[https://support.mozilla.org/en-US/kb/secure-website-certificate Secure website certificates] |- |handlers.json |File types and download actions |It stores your preferences with respect to what Firefox does when it comes across known file types, such as whether you want to save a file or open it with a specific application. |[https://support.mozilla.org/en-US/kb/change-firefox-behavior-when-open-file Manage file types and download actions in Firefox] |} ''Based on information from [http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox Transferring data to a new profile - Firefox (mozillaZine KB)]''