There are Chrome and Firefox extensions to indicate the presence of the header. https://chromewebstore.google.com/detail/clacks-overhead-gnu-terry/lnndfmobdoob

There are Chrome and Firefox extensions to indicate the presence of the header. https://chromewebstore.google.com/detail/clacks-overhead-gnu-terry/lnndfmobdoobjfcalkmfojmanbeoegab?hl=en&pli=1 https://chromewebstore.google.com/detail/clacks-overhead-gnu... https://addons.mozilla.org/en-US/firefox/addon/x-clacks-overhead/ https://addons.mozilla.org/en-US/firefox/addon/x-clacks-over...