Can't search pdf files opened with Evince in Firefox

[ckx]

I can open a PDF file in a tab using Ubuntu 12.04 and Firefox 11, I was never able to do that in previous versions. But I can't search the PDF. The search box appears underneath the screen but I can't enter any text. No problems if I open a PDF (with Evince) outside the browser.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: mozplugger 1.14.3-7
ProcVersionSignature: Ubuntu 3.2.0-21.34-generic-pae 3.2.13
Uname: Linux 3.2.0-21-generic-pae i686
ApportVersion: 2.0-0ubuntu2
Architecture: i386
Date: Tue Apr 3 18:59:00 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120305)
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=nl_NL.UTF-8
 SHELL=/bin/bash
SourcePackage: mozplugger
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.