Will this also force Do Not Track to be on, similar to the current tracking blocklists in Firefox? That's the primary reason why I have it turned off and rely on uBlock Origin + a few other extensions.
"Send web sites a “Do Not Track” signal that you don’t want to be tracked
(_) Always
(_) Only when Firefox is set to block known trackers"
These two options don't become irrelevant, but the choice related to them does if the default is "block known trackers" (if that is the same as "block all 3rd party trackers by default).
And that is exactly why I would like it to not be forced on (or off). I want my browser to report no DNT setting at all, to reduce my fingerprinting profile.
https://panopticlick.eff.org/ reports that 1 in 1.67 browsers send the DNT header, so the best option fingerprinting-wise might be to leave it on, at least information-wise.
Sorry, I left that part out. My browser sends DNT=1, and I get 1/1.67, which should mean that 1/1.67 browsers send DNT=1. This means that the total share of browsers that send the DNT header at all is at least 1/1.67, but probably higher.