@orangecoastcollegeprivacy @Purism, just looking at Purism for the first time myself, but in-app ad-blocking shouldn't be an issue as GNU/Linux (e.g. Ubuntu) apps generally don't do any kind of advertising whatsoever. For the interwebs, you could either install an ad-blocking add-on to your favourite browser (probably the most practical approach), or install a system-wide ad-blocker.
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