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

Dave,

> Ah - so your GM is a XUL addon, presumably unaffected.

I cannot be certain, but I've yet to find something inexplicably not 
working.   Than again, most of the GM scripts I've written are webpage 
scrubbers.   Only very few use listners of any kind.

> It's background scripts that don't work according to that bug.

The question I tried to answer was "(In fact, does any WX addon work in 
v52?).".  Yes, they work - if only partly  - and I specified which part.

> Maybe you can find a XUL addon that displays http responses

:-)  I first spend time googeling for a GM script.  Later I tried to google 
for an add-on.  That is how I found that "HTTP status code" plugin - which 
turned out to be a WAX, not a XUL one.  And that lead to my discovery that 
WX on FF v52 has a bug.

I also googled if FF actually has a mechanism to just inspect (read) the 
HTTP status value for the current page.  I could not find any.  For some 
reason catching the page-load error yourself seems to be the only way.

I've also been looking at the "Browser.ja" and "main.ja" libraries, but have 
not been able to find a lead there either.

Regards,
Rudy Wieser