Firefox Sync

Firefox Sync, originally branded Mozilla Weave,^[2] is a browser synchronization feature for Firefox web browsers. It allows users to partially synchronize bookmarks, browsing history, preferences, passwords, filled forms, add-ons, and the last 25 opened tabs across multiple computers.^[3] The feature is now included in Firefox and is being implemented in Thunderbird.^[4]

Firefox Sync

Developer(s)	Mozilla Corporation, Mozilla Foundation
Initial release	December 21, 2007 (2007-12-21)[1]
Stable release	N/A (part of Firefox) [±]
Repository	github.com/mozilla-services/syncstorage-rs
Operating system	Cross-platform
Type	Browser synchronizer
License	MPL/GPL/LGPL
Website	mozilla.org/firefox/features/sync/

It keeps user data on Mozilla servers, but according to Mozilla the data is encrypted in such a way that no third party, not even Mozilla, can access user information.^[5] It is also possible for the user to host their own Firefox Sync servers, or indeed, for any entity to do so.^[6]

Firefox Sync was originally an add-on^[7] for Mozilla Firefox 3.x and SeaMonkey 2.0, but it has been a built-in feature since Firefox 4.0^[8] and SeaMonkey 2.1.^[9]

Firefox Sync is built on top of Firefox Accounts as of Firefox 29, and therefore Firefox 29 and later cannot sync with Firefox 28 and earlier.^[10]

Firefox Home

Main articles: Firefox Home and Firefox for iOS

Firefox Home was a companion application for the iPhone and iPod Touch based on the Firefox Sync technology. Firefox Home was not considered a web browser, as it would launch pages in either an embedded viewer or by switching to the Safari app.^[11][12] In December 2014, Mozilla announced Firefox for iOS, a version of the Firefox browser for iOS,^[13][14] which includes Firefox Sync support for syncing Firefox's browsing history, bookmarks, and recent tabs.

Sync Server

Mozilla also offers a synchronization server application for use with Firefox Sync, for users and businesses that prefer to host their own synchronization data.^[6]