[Bug 803348] [NEW] In Firefox, scrolling and then pressing Ctrl causes zoom

[Jonas Olson]

Public bug reported:

When scrolling a heavy webpage in Firefox tend to lag on my computer so
that the motion of the page continues after I have stopped giving
scrolling commands. If I then, before the page has stopped, press Ctrl
(to Ctrl-Tab switch between tabs, for example) Firefox starts to zoom
the page (as when you scroll while holding Ctrl). This is unwanted
behaviour every time for me. I'm using Ubuntu 11.04 with Firefox 5
(5.0+build1+nobinonly-0ubuntu0.11.04.2). In Ubuntu 10.10, the behaviour
was the expected, i.e., zooming or scrolling was determined based on if
you held Ctrl pressed while rolled your scroll wheel, not whether Ctrl
was pressed during the motion of the page.

To reproduce:
1. Open a webpage in Firefox, preferably a large and heavy one.
2. Make sure your computer is slow enough that the scrolling motion of the page lags appreciably behind the scrolling commands of your mouse wheel.
3. Stop rolling the wheel and while the page is still scrolling, press Ctrl. This causes Firefox to zoom the page.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: firefox 5.0+build1+nobinonly-0ubuntu0.11.04.2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Wed Jun 29 10:10:27 2011
FirefoxPackages:
 firefox 5.0+build1+nobinonly-0ubuntu0.11.04.2
 flashplugin-installer 10.3.181.26ubuntu0.11.04.1
 adobe-flashplugin N/A
 icedtea-plugin 1.1~20110420-0ubuntu1.1
ProcEnviron:
 LANGUAGE=sv_SE:en
 PATH=(custom, user)
 LANG=sv_SE.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox
UpgradeStatus: Upgraded to natty on 2011-06-03 (25 days ago)

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 natty

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Title:
  In Firefox, scrolling and then pressing Ctrl causes zoom

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