<a href="https://support.mozilla.org/no/kb/privacy-preserving-attribution" rel="nofollow">https://support.mozilla.org/no/kb/privacy-preserving-attribu...</a> explains what the setting is about, the important bit being:<p><pre><code> > 3. Firefox creates a report based on what the website asks, but
> does not give the result to the website. Instead, Firefox encrypts
> the report and anonymously submits it using the Distributed
> Aggregation Protocol (DAP) to an “aggregation service”.
> 4. Your results are combined with many similar reports by the
> aggregation service. The destination website periodically receives
> a summary of the reports. The summary includes noise that provides
> differential privacy.
</code></pre>
The above docs also tell you how to turn it off with mouse clicks in regular settings (I don't understand why OP proposes to set it using the command line, perhaps so they can run it as a cronjob in case it gets reset? ¯\\_(ツ)_/¯ ).<p>-----<p>The intention of the project seems to be that the surveillance economy should switch over to this less invasive method of tracking you, and that perhaps if only Everyone did that then they would stop doing the worse tracking. Good intentions, but I'm guessing the only real effect it will have is to make some people stop using Firefox, most people not even notice it's there, and trackers will just use this as yet another input among their many other inputs. (OTOH, maybe Mozilla gets paid a lot for this aggregated data, I guess that's "good".)