Cloudflare is actually pretty upfront about which browsers they support. You can find the whole list right in their developer docs. This isn't some secret they're trying to hide from website owners or users - it's right here https://developers.cloudflare.com/waf/reference/cloudflare-c... - My guess is that there is no response because not one of the browsers you listed is supported.
Think about it this way: when a framework (many modern websites) or CAPTCHA/Challenge doesn't support an older or less common browser, it's not because someone's sitting there trying to keep people out.
It's more likely they are trying to balance the maintenance costs and the hassle involved in allowing or working with whatever other many platforms there are (browsers in this case). At what point is a browser relevant? 1 user? 2 users? 100? Can you blame a company that accommodates for probably >99% of the traffic they usually see? I don't think so, but that's just me.
At the end, site owners can always look at their specific situation and decide how they want to handle it - stick with the default security settings or open things up through firewall rules. It's really up to them to figure out what works best for their users.
Think about it this way: when a framework (many modern websites) or CAPTCHA/Challenge doesn't support an older or less common browser, it's not because someone's sitting there trying to keep people out. It's more likely they are trying to balance the maintenance costs and the hassle involved in allowing or working with whatever other many platforms there are (browsers in this case). At what point is a browser relevant? 1 user? 2 users? 100? Can you blame a company that accommodates for probably >99% of the traffic they usually see? I don't think so, but that's just me.
At the end, site owners can always look at their specific situation and decide how they want to handle it - stick with the default security settings or open things up through firewall rules. It's really up to them to figure out what works best for their users.