Firefox has a "Tell sites that I do not want to be tracked" option (Preferences -> Privacy).

It also has options to send or not send data back to Mozilla about browser perforrmance and crash reports (Preferences -> Advanced -> Data Choices).

That's the only tracking that Firefox does as far as I'm aware. Not sure about Chrome or Chromium.
posted by tagawa Staff2 years and 11 months ago Link

regarding I don't want to be tracked: ddg used to have a web page that told all about that and what a farce it is

for some reason they pulled that page but you can still read it on the waybackmachine at http://web.archive.org/web/2014121815333...

pretty good read
posted by buckeye 2 years and 11 months ago Link
In my opinion, Duckduckgo should have that page up again and show this page to the users.
posted by JSmith123963 2 years and 11 months ago Link
We now forward that page to donttrack.us and fixtracking.com goes to Gabriel's post on privacy. The reason for the changes is that both pages require more attention/updates than we can spare. This is a good thing, signaling that positive movement is happening in the privacy industry, but would be bad if we are showing outdated information or drawing attention away from positive efforts.
posted by zac Staff2 years and 11 months ago Link