[greenshackle2]

It's Firefox doing it to prevent Facebook (and Instagram) from scraping your history.

If you're not on Firefox, then I don't know.

[fleddr]

That makes total sense, thanks!

[commoner]

Is there an announcement, help page, or issue/commit explaining this feature?

[greenshackle2]

There's this:

https://www.mozilla.org/en-CA/firefox/facebookcontainer/

I'm not sure if it's built into some versions now?

It does it on my Windows computer but not my Linux laptop, and I don't remember explicitly installing this extension on either.

[gabes]

Ah of course. Shows how I hold my bias toward Facebook :facepalm: