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

On 20 Jan 2021 20:08:02 +0100 R.Wieser wrote:
>
>> An addon could do it.
>
>Maybe not.   I've been googleing to how I can retrieve the HTTP status using 
>JS or by way of the DOM, but got nowhere.

<https://addons.mozilla.org/en-GB/firefox/addon/http-status-code/>

That WebEx will use a background script API, I don't think you can do it 
in a content script - or GM script. I don't know what service a legacy 
addon would use, but it could certainly be done.

You could also use a web proxy, like privoxy. I've used that to detect 
and change responses. But it's a lot of effort for what seems like a 
minor problem.
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