I'm going to apologize in advance, but I have *no* idea what's happening but know it's bug worthy. I'll try to be as precise as possible. I'm also not sure whether this is the right product to file this under, but here goes. On Firefox for iOS version 3.0 (11), I sent a tab (http://www.wired.com/2016/04/nests-hub-shutdown-proves-youre-crazy-buy-internet-things/) from my iPhone to my computer (48.0a1 2016-04-05). When I opened up my computer, the tab was waiting for me (which is good). However, the tab wouldn't load (which is bad). I hit the refresh button several times, nothing happened. I finally put my cursor in the URL bar and hit 'enter' on the keyboard, and that finally loaded the page. A pain, but the workaround worked. I started doing some other things. Then I noticed I had 2 other 'repeat' tabs of the tab I had sent ('Nest's Hub Shutdown'). I didn't think much of it, thinking it was user error on my part (since I had tried reloading it several times). I closed them down, saving one of the instances so I could actually read it. But as I started doing other stuff in the browser (load a new tab, open a link from an email, etc) I realized that this same 'Nest's Hub Shutdown' article has been opening up in new tabs again. I know it's not user error this time - it's just doing it on its own. I can't get it to open consistently if I open a new tab or a link - there's some other sequence of events that needs to happen. And it's just happened again now! I had opened another link from my email, was typing away in that tab, moved away from that tab to this tab to continue writing in this bug, and then suddenly a new instance of the article has just loaded up in this window next to the two other tabs I've been working away on. Let me know if there's anything I can do to try and troubleshoot, of if we think this is just a fluke of nature.

So here's something else. I opened a new tab and went to adjust.com. I tapped 'log in' and got the sign-in dialogue box. I have my credentials in the log-in box and click 'sign in' and what happens? I don't sign in, but rather a new tab with the 'Nest Hub Shutdown' article loading - every single time. It's not letting me sign into adjust, but instead just opening up the 'sent tab' article instead.

BTW, I have decided it's not user error (ie in my attempts to refresh the tab). I have now had this tab opened on its own over 25 times now. Something to do with the sync service?

Hey Karen. There's an known issue about sent tabs being shown on desktop after each sync. Please see bugs: https://bugzilla.mozilla.org/show_bug.cgi?id=1262021 https://bugzilla.mozilla.org/show_bug.cgi?id=1261966

GREAT! And given it looks like it was just resolved / fixed, I'll wait another few days before trying again. Glad it was picked up!