Doesn’t have to be, some features are only available in certain browsers (usually Chromium). For example AFAIK Chromium is the only browser that allows you to connect in the browser to Bluetooth devices, its the only browser that can access for example a phone’s NFC chip or that can interact with USB devices.
Because that would reveal that their site is flawed, instead of blaming the customer for not using the right browser.
Doesn’t have to be, some features are only available in certain browsers (usually Chromium). For example AFAIK Chromium is the only browser that allows you to connect in the browser to Bluetooth devices, its the only browser that can access for example a phone’s NFC chip or that can interact with USB devices.