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

On 21 Jan 2021 08:35:18 +0100 R.Wieser wrote:
>
>> Try an earlier version.
>
>I would love to.  Do you know where I can get it ?  I quick google doesn't 
>turn anything up - just posts of people having the same question. :-|
>
Just add /versions to the AMO url.

But the manifest looks a bit sparse to me: no ID, no Application. Try 
adding those - check what's mandatory. Was this a Chrome Extension? Maybe 
it never worked on Fx. 

Perhaps somebody with desktop Fx could try it - I'm on Androud here.
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