If you are on Windows, you already have a good antivirus program built in, and that is Windows Defender. Other than that, be sure to install uBlock Origin extension in your preferred browser - it not only eliminates ads, but also annoying pop-ups, embeds, trackers, malware sites and other annoying things on the internet. When you want to download something, and you’re not sure if it’s safe, scan the download link with VirusTotal.

There is Mastodon. You just have to get used to it.

I prefer not to damage my magazines in any way, at least for now.

Agreed. I was using TiviMate on my NVIDIA Shield TV when I still had an active IPTV subscription, and nothing comes close in terms of usability and ease of use. I wish legit IPTV providers could offer us a way to watch TV from them with all those apps.

No, but it works with ComfyUI. I’m testing it right now.