I’m sorry if this does not belong here; I’m not quite familiar with this place yet. Feel free to move it if necessary. Thank you.
This post is aimed to inform you.
So, I was surprised to find an Advanced Privacy notification this morning warning me that a tracker related to DuckDuckGo browser had been blocked. Unfortunately, I wiped out the notification and forgot to write down the name of the tracker. Sorry about that.
How could that be? DDG blocks all the trackers it finds in all the apps and it wouldn’t be able to block one in a website?
I found the tracker in Advanced Privacy history, it’s TagCommander (Commanders Act).
I’d like to know what knowledgeable people think of this.
Thank you.
Trackers, like viruses, are constantly changing. If DDG becomes aware of the one it missed, it will most likely be added to the list and blocked subsequently.
What does “all trackers” mean? Does everyone have the same definition? What are the objective and measurable criteria for defining a tracker? Is there an official and up-to-date list?
Sorry, but there is no magic filter that blocks all trackers.
It means that Duck duck go does not block all the trackers because maintaining a list of them is a big work and also because they might receive payement for whitelisting some trackers…
That’s a bold statement and certainly a misunderstanding of what a browser is capable of. A browser might block trackers (those it knows and if technically feasible) for visited websites only but not for/ in other apps on your device.
If yes, I agree with the other users here: A browser can only block the trackers on websites it visits, not trackers in other apps. Your finding in Advanced Privacy most probably comes from a tracker that the DDG browser did not blacklist, but /e/OS did; or both blocked it at the same time, or something similar. It may however be possible that the DDG browser will add the tracker to its blacklist in the near future.
An addendum: I use Firefox with uBlock Origin, which is IMHO one of the best tracking and ad blockers on the market. Still, Advanced Privacy shows a lot of trackers for Firefox. They obviously come from the visited websites, and I assume that uBlock Origin and Advanced Privacy block them at the same time - maybe there is some timing issue, I do not know.
Feel free to move it if necessary. Thank you. 
