Google search and anything Google does massive data gathering on your browsing, fingerprinting etc. Some versions of Chinese 360 total security install add-ons in background.Īny that have shopping protection, browsing protection and other add-ons Users are free to install these addons if they wish, but doing so is not recommended, as it will alter the browser request fingerprint. We feel that this would damage our credibility in terms of demonstrating that we are providing privacy through a sound design alone, as well as damage the acceptance of Tor users by sites that support themselves through advertising revenue. Worse still, the unique filter sets that each user creates or installs will provide a wealth of fingerprinting targets.Īs a general matter, we are also generally opposed to shipping an always-on Ad blocker with Tor Browser.
Filters will also fail to do their job if an adversary simply registers a new domain or creates a new URL path. Coping with this fallout easily leads to just whitelisting the affected domains, hoping that this helps, defeating the purpose of the filter in the first place. For instance, there is a trend to observe that websites start detecting filer extensions and block access to content on them. Even with a precision rate at 99% and a false positive rate at 0.1% trackers would be missed and sites would be wrongly blocked.įilter-based solutions in general can also introduce strange breakage and cause usability nightmares. Trying to resort to filter methods based on machine learning does not solve the problem either: they don’t provide a general solution to the tracking problem as they are working probabilistically. There is still just a list containing specific URLs and hosts which, in this case, are assembled by Disconnect and adapted by Mozilla. Implementing filter-based blocking directly into the browser, such as done with Firefox’ Tracking Protection, does not alleviate the concerns mentioned in the previous paragraph. We believe that these addons do not add any real privacy to a proper implementation of the above privacy requirements, and that development efforts should be focused on general solutions that prevent tracking by all third parties, rather than a list of specific URLs or hosts. Site-specific or filter-based addons such as AdBlock Plus, Request Policy, Ghostery, Priv3, and Sharemenot are to be avoided. Please read the Tor Browser Design document: 2.3 Philosophy
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