1327524 - Autoscroll circle stays on page and causes constant "TypeError: Property 'handleEvent' is not callable." if tab closes

Status: NEW

(Firefox :: Tabbed Browser, defect)

Description

[arni2033]

>>>   My Info:   Win7_64, Nightly 49, 32bit, ID 20160526082509
STR_1:
1. Open url [1]
2. Click on the page [new tab will open]
3. In less than 3 seconds, middle-click on the page opened in Step 2
4. Wait 3 seconds
5. Move mouse over the page in selected tab

> [1] data:text/html,<script>var W; onclick=function(){W=window.open("data:text/html,<style>body{height:10000px}"); setTimeout(function(){W.close();},3000); }; </script><style>body{height:10000px}

AR:
 Step 4 - autoscroll circle stays on page.
 Step 5 - constant errors "TypeError: Property 'handleEvent' is not callable." (see below)
ER:
 Step 4 - autoscroll circle should disappear
 Step 5 - no errors

TypeError: Property 'handleEvent' is not callable.
hidePopup()popup.xml:134
handleEvent/<()browser.xml:1163
popup.xml:134:13
----Sources
view-source:chrome://global/content/bindings/popup.xml
view-source:chrome://global/content/bindings/browser.xml

Note:  I don't remember how exactly I got exact files/lines in stack trace, now I only get "(unknown)"