Blank page and URL

I’ve been leaving a MS Discourse 3k tab open in my browser.
A couple of times now, I’ve come back and the page is blank as is the URL.
Back button doesn’t work.
I have to dig the URL out of my browsing history to restore it.
Never seen this with another website…
I’m running Firefox 78.14.0

1 Like

Is this an intentional error?

Pale Moon can’t find the server at

On Pale Moon 28.10.4a1 for XP.

Strip out the www from that URL and give it another whirl.