Re: Retrieving a webpages shows a blank screen when a 4xx HTTP status is returned. Not helpfull.

Dave Royal<[email protected]> Sun, 24 Jan 2021 05:45:46 -0600
Newsgroups gmane.comp.mozilla.general
Message-ID <[email protected]>
Dave Royal <[email protected]> wrote:
> On 23 Jan 2021 21:55:04 +0100 R.Wieser wrote:
> Ah - so your GM is a XUL addon, presumably unaffected.
> 
> Maybe you can find a XUL addon that displays http responses. Which is where
> I came in a couple of dozen posts ago! SeaMonkey uses XUL addons.
> 
This?
https://addons.thunderbird.net/en-GB/seamonkey/addon/live-http-headers/
I remember using that once.
You may need to fiddle with install.rdf
-- 
(Remove numerics from email address)