648713 - pdf document scrolls in wrong tab when multiple tabs are open

Status: VERIFIED DUPLICATE of bug 273456

(Firefox :: General, defect)

Description

[Sam]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0
Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0

When two (or more) tabs are open, and one of the tabs has a .pdf document open (Plugin is Adobe Acrobat 9.1.0.163), when I switch the tabs and scroll in the other tab using the MOUSE scroll wheel, the page does not scroll down, but rather the .pdf document in the inactive tab scrolls down. This problem is new in Firefox 4. I had no problems like this before.

Reproducible: Always

Steps to Reproduce:
1.Open multiple tabs, one of which contains a .pdf file opened in the browser
2.move to any other tab and scroll down the page using mouse scroll wheel or mousepad (on laptop)
3.Current page will not scroll, instead the .pdf in the inactive tab will scroll down
Actual Results:  
Current page did not scroll, but pdf document in other inactive open tab scrolled down instead

Expected Results:  
The page should scroll down instead.

I have tried this with different pdf pages from different sources online, it gives the same results. This can be very frustrating for users that browse the web using the scroll wheel on the mouse and have a .pdf file open in another tab.