Well I have not used PureOS on a daily bases for few months since I removed it from my phone for another OS (personal choice), Currently using Fedora Mobile on the PinePhone (will have it on Librem soon also), and BSD on my work phone. But PureOS is good I might give it a try again when I get time to test it for now I am ok with my setup. I only say this since I am not sure what is the latest update on PureOS and the browser add ons and etc, but I am sure PureOS and Purism are committed to giving users privacy from ads and tracking but it cannot be do 100% I am sure no one can do it.
I personally have separate LAN networks at home, WORK NET with Private NextCloud server for my photos and private and work stuff without wireless, server backup done via custom build 802.3 protocol with custom build kernel. I use OpenWRT software for both router WORK and home NET. work net has pfsense firewall.
I am sure that ads cannot track my work etc since i don’t use social media or any out of home LAN or my corporate work LAN network. I only use my HOME network for stuff like that but my HOME PCs have no photos of me not even my full name only Alex very common name with 5 million people in Europe.
Worse hackers can do is steal my steam account or origin or watch stuff on my netflix, hbo or hulu.
Yes I get ads on my game email, but mostly game offers never products since they don’t know who I am etc.
My home country and my current country of residence are not much into politics, but even if they were they got zero data points on me so if they don’t know who I am and they cannot collect data on me so … no data for the user no ads for the user. Sadly due to my profession of Data Scientist I am aware of the dangers of data collection and how that data can be used and abused, even people enter or give info for free like facebook.
I currently don’t even have a phone with a sim card or a number by choice only use my work sat phone for internet with BSD and my Fedora Mobile for personal stuff work fine, for talking to my GF online I build an app for chat and video using custom encryption and I am not worried anyone can hack in since it only work on VPN via LAN and using a custom 802.3 protocol and custom linux kernel version.
at work we also build our own apps and 100% of our service are hosted in LAN so zero cloud or internet.
I don’t communicate to people outside my company the people who do use outside LAN for it.
I am not advising anyone to do what I do just giving an example that you have a choice to use or not to use social media and same goes for anything online you need to adapt to change and follow what is the best way to keep you save what worked in 2010 will not work in 2020, and what works now will not work in 2025.
Keeping up with changes is the main reason why I am active in forums and read about it, since forums give more information then any formal official news written by PR expects that give unreal picture of real events.
My best advice to avoid ads political or whatever is use different PCs for work and personal stuff, or different users on same PC or even different browsers IT can minimize the information and install ad blockers and avoid using social media all together if possible, and avoid using sites that track info full of ads like social media sites
EDIT: apologies for my English but I am a non native speaker, just saying to avoid any future comments like few I had in this forum about previous posts I had here (here I mean on this forum).
Regards, Alex