Earlier quoted context omitted.
For unsubscribe - yes. Everything else - no. But if I am using standards and they have an ad blocker that blocks some of the functioning of my site, am I also required to test my site against that?
> Everything else - no. I'd include _everything_ important in the "yes" category. If I cannot access the customer panel to update settings or notify them of a bug that is affecting me because I'm using Firefox ("works for 95% of users"), they're just not keeping up their end of the contract. Remember, 95% excludes everything but chromium/webkit-engines.
Every company decides which customers are worth going after.