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'''Fusion''' ('''F'''irefox '''USI'''ng '''ON'''ions) is a Mozilla project , in collaboration with [https://www.torproject.org/ the Tor Project], to build bring the cutting-edge security and privacy features for to Firefox users. <br>Fusion will leverage by leveraging the technologies of the Tor Project, especially the ones in the Tor Browser and Tor Proxy, to bring more privacy options for users.
Fusion was initiated This project is experimental and in 2018. Mozilla and [https://www.torproject.org/ the Tor Project] are working closely on this projectbeginning phases.
= Background =
Mozilla The Firefox and the Tor Project Browser teams are long-time collaborators. In 2016, we started the The Tor Browser team builds [https://wikiwww.mozillatorproject.org/Securityprojects/Tor_Uplift torbrowser.html Tor Uplift projectBrowser] by adding privacy-enhancing patches to take [https://www.mozilla.org/en-US/firefox/organizations/ Firefox ESR]. When this collaboration to process first began, the next level, bringing Firefox and Tor Browser closer together than ever beforeteam would have to update these patches each time a new version of Firefox was released, which was very time intensive.
The Tor Browser team builds In 2016, we started the [https://wwwwiki.torprojectmozilla.org/projectsSecurity/torbrowser.html Tor_Uplift '''Tor Uplift project'''] to take the Tor Browser] by taking [https://wwwpatches and "uplift" them to Firefox.mozilla.org/en-US/firefox/organizations/ When a patch gets uplifted, the Firefox ESR] team takes the change Tor Browser needs and applying some patches adds it to itFirefox. These changes add valuable privacy features for Tor Browser usersin Firefox are disabled by default but can be enabled in preferences. But having these changes means that every time Because preferences can be changed rather than updating each patch, the Tor Uplift project saves the Tor Browser team wants to use a new version lot of Firefox, they have to update the patches to work with the new version. These updates take up a substantial fraction of the effort involved in producing Tor Browser.
In 2016, we started The primary targets of the Tor Uplift project to take the Tor Browser patches were two features: [https://wiki.mozilla.org/Security/FirstPartyIsolation '''First Party Isolation'''] and "uplift" them to Firefox[https://wiki.mozilla.org/Security/Fingerprinting '''Fingerprinting Resistance''']. When a patch gets uplifted, we take the change that Tor Browser needs and we add it to First Party Isolation was shipped in Firefox in such a way that it is disabled 52 (off by default, but can be enabled by changing a preference value. The Tor Uplift project saves ); the Tor Browser team work since they can just change preferences instead MVP of updating patches. It Fingerprinting Resistance will be shipped in Firefox 59 (also gives the Firefox team a way to experiment with the advanced privacy features that Tor Browser team is building, to see if we can bring them to a much wider audienceoff by default).
The primary target of the Tor Uplift project was two also gives the Firefox team a way to experiment with the advanced privacy features: [https://wikithat Tor Browser team is building, to see if we can bring them to a much wider audience.mozilla.org/Security/FirstPartyIsolation That's the goal of ''First Party Isolation'Fusion''] and [https://wiki.mozilla.org/Security/Fingerprinting '''Fingerprinting Resistance''']. First Party Isolation was shipped in Firefox 52 (off by default); , the MVP next big step of Fingerprinting Resistance will be shipped in Firefox 59 (also off by default)the collaboration between Mozilla and Tor.
'''Fusion''' is the next big step of the was initiated in 2018. Mozilla and the Tor collaboration. We hope to move the needle on Web privacy based Project are working closely on the success of the Tor Uplift workthis project.
= Project Vision =
Mozilla and the Tor Project are aligned with each other on the mission to protect user privacy on the Web.
* The fourth principle of [https://www.mozilla.org/en-US/about/manifesto/ The Mozilla Manifesto] is '''"Individuals’ security and privacy on the Internet are fundamental and must not be treated as optional."'''
* The Tor Project's mission is '''"to advance human rights and freedoms by creating and deploying free and open anonymity and privacy technologies, supporting their unrestricted availability and use, and furthering their scientific and popular understanding."'''
We believe the collaboration between Mozilla and Tor can create a positive, significant impact on the world, and help by bringing cutting-edge privacy enhancing technology to more users to regain their privacy.
= Project Goals =
UltimatelyAlthough this project is still experimental and in beginning phases, we hope the ultimate long-term goal of Fusion is to integrate full Tor Browser features in Firefox. There are many potential paths to this. For examplefor our project, including enabling some features by default and but other options others only in [https://support.mozilla.org/en-US/kb/private-browsing-use-firefox-without-history Private Browsing Mode].
We need a lot of research and experiments to support the decision-making for the final solution. However, the clear short and mid-term goals are:
