tornull.org - Tor Browser Bundle Null Advisory
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Revised 14th January 2021 for TBB 10.0.8
Firefox about:config Additional Privacy, Security and Anonymity Settings;
[Notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning
Disclaimer : tornull.org can neither confirm nor deny if any combination of these advisory settings will further ensure your privacy, now or forever ... 'Here be dragons!' and/or 'This might void your warranty!' (Changing these advanced settings can be harmful to the stability, security, and performance of this application. You should only continue if you are sure of what you are doing.) You agree to continue at your own risk! ...
How to EDIT the Tor Browser Bundle about:config (clearnet links!)
How to stop Firefox from making automatic connections :
https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections (clearnet links!)
Disable link prefetching :
network.prefetch-next ; false - (Recommended) - http://kb.mozillazine.org/Network.prefetch-next
Contextual feature recommendations and other notifications :
extensions.blocklist.enabled ; false - (Optional)
app.normandy.enabled ; false - (Recommended)
Ignore "What's new" page :
browser.startup.homepage_override.mstone ; ignore - (Recommended)
Disable some media capabilities :
media.gmp-gmpopenh264.enabled ; false - (Recommended)
webgl.disabled ; true - (Recommended)
browser.send_pings.require_same_host ; true - (Recommended) - http://kb.mozillazine.org/Browser.send_pings.require_same_host
browser.send_pings.max_per_link ; 0 - (Recommended)
dom.vibrator.enabled ; false - (Recommended)
Disable hyperlink auditing :
beacon.enabled ; false - (Recommended)
Referer :
network.http.sendRefererHeader ; 0 - (safest) - http://kb.mozillazine.org/Network.http.sendRefererHeader
Disable history features :
browser.sessionhistory.max_entries ; 2 - (Recommended) - Clicking the 'back button' will remember only the last 2 visited pages
places.history.enabled ; false - (Recommended)
layout.css.visited_links_enabled ; false - (Recommended) - plugging-the-css-history-leak
Disable copying and pasting features :
clipboard.autocopy ; false - (Optional - Linux OS only) - http://kb.mozillazine.org/Clipboard.autocopy
dom.event.clipboardevents.enabled ; false - (Recommended) - dom.event.clipboardevents.enabled
Caching, Storage and Memory :
dom.storage.enabled ; false - (Recommended / Optional) - http://kb.mozillazine.org/Dom.storage.enabled - Blocks the (correct) storing functions of some websites. N.B. Users may experience unexpected 'issues' with various intrusive and/or persistent web elements i.e. content, cookies, buttons, logins 'not working' as expected with this set to false. That's the point! In many respects DOM Storage could be worse than having javascript enabled in terms of your privacy and security. However, if something isn't working correctly in this regard - it's probably this setting! i.e. revert to true.
browser.cache.memory.enable ; false - (Recommended / Optional) - http://kb.mozillazine.org/Browser.cache.memory.enable - Keep this enabled for 'faster' browsing.
services.sync.prefs.sync.privacy.trackingprotection.enabled ; false - (Recommended / Optional)
services.sync.prefs.sync.privacy.trackingprotection.pbmode.enabled ; false - (Recommended / Optional)
Always set the Tor Button > Privacy and Security Settings... Security Level > High - for optimal Privacy, Security and Anonymity
If you 'trust' a website and a page element or function isn't working correctly you can always lower the slider to enable it.
N.B. Don't just blindly follow some random websites opinion on YOUR browsers important security settings ...
Try testing what other privacy professionals think ...
- https://coveryourtracks.eff.org
Remember : Test results will vary with your Tor Button's slider Security Settings... > Security Level !
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[Notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning