337921 - Middle-clik / Scroll / Middle clicks loads a random page

Status: RESOLVED DUPLICATE of bug 135884

(Firefox :: General, defect)

Description

[Vladimir]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3

When middle clicking a page to scroll down (that is to say when the 4-directional cross appears), move a little the mouse downwards (or any way you want), click with the middle button again and...

It opens a (apparently random) page (sometimes one i already visited, sometimes not). Sometimes, it fails and returns an error message "Cant open specified page" or something like this.

Reproducible: Always

Steps to Reproduce:
1. Go to www.google.com
2. Make any search, for example "week end"
3. Middle click (CLICK, do not hold) in order to scroll down the page : the two-directional icon appears
4. Move mouse down to go down
5. Click mouse's middle button

And Voilaà !

Actual Results:  
It appears to load a random page, sometimes related to the content of the clipboard (eg : i copy "hello", and the above sequence loads "www.hello.com"), sometimes returns en error message; sometimes loads a visited (or not) page...

Expected Results:  
I don't know... for example : nothing :)
It is quite disturbing at first... or at least this could be set in the "preferences", for people needing such a functionality...

It appears to work whatever theme I use - but you obviously need a 3 button mouse to see it... I appears to work with any (HTML) page.

It may be possible for a hacker to put a javascript routine that copies a website (eg : "www.ihackyou.com") and then wait for a visitor do scroll down the page... So it may also be a security issue...

about:buildconfig :

about:buildconfig

Build platform
target
i586-pc-msvc

Build tools
Compiler 	Version 	Compiler flags
$(CYGWIN_WRAPPER) cl 	12.00.8804 	-TC -nologo -W3 -Gy -Fd$(PDBFILE)
$(CYGWIN_WRAPPER) cl 	12.00.8804 	-TP -nologo -W3 -Gy -Fd$(PDBFILE)

Configure arguments
--enable-application=browser --enable-update-channel=release --enable-optimize --disable-debug --disable-tests --enable-static --disable-shared --enable-official-branding --enable-svg --enable-canvas --enable-update-packaging

Comment 1

[Ria Klaassen (not reading all bugmail)]

In that case you need to set middlemouse.contentLoadURL to false in about:config.
http://kb.mozillazine.org/About:config
http://kb.mozillazine.org/Middlemouse.contentLoadURL

Comment 2

[Ria Klaassen (not reading all bugmail)]

*** This bug has been marked as a duplicate of 135884 ***