Yep, that’s exactly what is happening; I’ve seen the same and just kept reminding everyone not to click on ads. Took a while but they actually got it.

I run Pihole on physical Pi’s and once configured to my liking has been quite nice. I’ve even had family compliment that they miss the ad blocking when they leave the home :)

We share a single PC account and do exactly this to easily separate our profiles; here’s what I have for my launcher for example:

[Desktop Entry]
Version=1.0
Name=David-Firefox
Comment=Browse the World Wide Web
GenericName=Web Browser
Keywords=Internet;WWW;Browser;Web;Explorer
Exec=firefox %u -P David --class Davidfox
Terminal=false
X-MultipleArgs=false
Type=Application
Icon=/home/david/Launchers/Firefox/Firefox-David.png
Categories=GNOME;GTK;Network;WebBrowser;
MimeType=
StartupNotify=true
Actions=NewWindow;NewPrivateWindow;ProfileManager;

[Desktop Action NewWindow]
Name=Open a New Window
Exec=firefox -P David --class Davidfox -new-window

[Desktop Action NewPrivateWindow]
Name=Open a New Private Window
Exec=firefox -P David --class Davidfox -private-window

[Desktop Action ProfileManager]
Name=Open the Profile Manager
Exec=firefox -ProfileManager --class Davidfox

Here I’m using a custom icon to help tell our profiles apart on our dock and use a custom window class so each profile’s windows will group with each other as well.

I haven’t purchased yet; this is the one I’m currently considering:

https://a.co/d/dDdzptv

I’m in a similar situation currently hosting Pihole on my Pi’s and Jellyfin on a SFF refurbished PC that’s running some other project. I’ve decided to go with a NUC, most likely beelink, and intend to install Proxmox to then run container VMs for each of the various projects to more easily manage them.