Configuring Firefox in order to prevent cross-browser tracking

[therealOri]

When using firefox and adjusting the certain settings below in the config. This entire thing just fails to function.

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful or accepting the risk.

(2) In the search box above the list, type or paste neww and wait for the list to finish filtering.

(3) Change the preferences as follows:

(A) browser.link.open_newwindow - for links in Firefox tabs.
3 = divert new window to a new tab (default)
2 = allow link to open a new window
1 = force new window into same tab <= Change to this one

(B) browser.link.open_newwindow.restriction - for links in Firefox tabs.
0 = apply the setting under (A) to ALL new windows (even script windows) <= Change to this one
2 = apply the setting under (A) to normal windows, but NOT to script windows with features (default)
1 = override the setting under (A) and always use new windows

(C) browser.link.open_newwindow.override.external - for links in other programs.
-1 = apply the setting under (A) to external links (default)
3 = open external links in a new tab in the last active window <= Change to this one
2 = open external links in a new window
1 = open external links in the last active tab replacing the current page

(4) Then using this website (the one you have for testing this stuff). Try to "Get my Identifier" to see results.

Note: I don't know how to add a label to this, so what I want it to be is in the title.

[spalt08]

Thanks for the tip! Good job.

[Bad3r]

Can confirm that it works on firefox-nightly 90.0a1 (2021-05-14) (64-bit)

[Yetoo1]

After applying the settings with firefox 88.0.1 (64-bit) on a recently updated Fedora 33 5.11.20-200.fc33.x86_64 install, the schemeflood website redirects to about:blank right as Get Identifier is clicked. I'm not sure if that's intended.

Applying the settings to tor 10.0.16 yields one application which is the only application in the list I have installed. Before I applied the settings in regular Firefox it was consistently getting that same application correct, but it was getting false positives with around 2-3 other applications. So tor is doing worse for me at the moment due to it not at least having randomized cover of false positives. I'm not sure if the pop-up blocking discussed in the article has to do with the lack of effectiveness, (I'm ware for the mitigations experimented with on the tor issue tracker, but still).