Seems to happen only when composing a meme

That's weird, the URL mentioned has nothing to do with Imgflip. Could be from an ad provider. I don't think it is dangerous--Heroku is a fairly large service. Does this pop-up take over/break the whole page forcing a page reload, or are you able to X out and continue?

TY !
Long as I've got you, is there supposed to be ads @ the bottom of the page too?
I get them trying to make meme comments, and it prevents view of the upload button to where I have to shrink the browser to like 35% and do an F11 on the keyboard to expose the button just enough to accomplish this maneuver.

Sorry to hear that, sounds frustrating. Can you please send us a screenshot of that obtrusive behavior? Posting here or sending to [email protected] would be awesome.

Sent one in an email too. Here's two, there's all different kinds of advertisers, and sometimes they are much "higher' ONLY happens to me on imgflip Thanks again, they do come up when just on the regular streams while viewing, but they are just distracting, not preventing anything like when composing.