Bob F wrote:

R.Wieser wrote:

Just now I entered an URL into FF 52 which resulted in a blank
window. Asking for the sourcecode gave me the same blank window.
Only after opening the "net" tab on the "Broser console"
(ctrl-alt-j) window and reloading I saw that I got a 410 (gone)
result.

Question : how do I get FF 52 (on XPsp3) to show "failure" (non 200)
codes ?

I just tried it on FF 84.0.2 and just got a blank (white) page.

Did you go into Developer Mode to look at the return status code under
the Network tab?

The complaint is that Firefox doesn't show the user the 410 error code
unless you dig into Dev mode. I'm trialing an add-on that shows the
status code returned by the server.

https://addons.mozilla.org/en-US/fir...p-status-code/

So far, it's worked okay. You can also click on the add-on's toolbar
icon to be taken to a httpstatuses.com web page explaining the status
code. Don't know if I'll keep it, though, unless I hit more sites where
Firefox present an empty document instead of showing error status codes.