Tor Browser 8.0, noscript pops up a full-browser-size window to warn me about x-site scripting

When I go to certain sites in the Tor Browser 8.0, I get a new window popping up, which is the same size as my current browser window, which looks like it comes from noscript. It says "NoScript XSS Warning" at the top, and the window title is moz-extension://4536b558-.... NoScript XSS Warning", and there's a bit of text towards the top that says

NoScript detected a potential Cross-Site Scripting attack

from http://www.espn.com to https://8397396.fls.doubleclick.net.

Suspicious data:

(URL) https://8397396.fls.doubleclick.net/activityi;src=8397396;type=espng0;cat=espna0;u1=http://www.espn.com/mlb/story/_/id/24116616/mlb-bryce-harper-brings-house-epic-derby-comeback;u2=[s.products];u3=[c.promocode];u4=[payment method];u5=[c.SWID];u6=[c.UNID];u7=[c.NavMethod];u8=[Trial/Monthly/Annual];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;tfua=;npa=;ord=9016327828417.457?

and towards the bottom I have the options to block, always block, allow, always allow, and then an ok button.

The example url in this case was http://www.espn.com/mlb/story/_/id/24116616/mlb-bryce-harper-brings-house-epic-derby-comeback

(I've noticed the behavior happens pretty consistently with espn urls.)

I'm not sure quite what behavior I would expect instead, but "making a new huge window that's mostly whitespace and that prevents me from doing anything on any tab until I've made the window go away" was not it. :)