That’s a helpful analysis! So there is zero tracking in there. It is just anonymous measurement of a campaign, which is perfectly fine. It is NOT person specific.

What i didn’t understand is if this link to Firefox was inserted by you at all. It looks like it was appended to a completely unrelated link that you wanted to share. So Firefox hijacked your message to insert a second link. Is that correct? Because that would infuriate me. I found this seeing in my Firefox and it defaulted to be active.