offline start page doesn't work

That used to work in oneiric, or more precisely, with the firefox version we had back then. Chris, right now u-d-b does this in distribution.ini:

[Preferences]
browser.startup.homepage="http://www.ubuntuforums.org?release=12.04"
browser.startup.homepage_reset="http://www.ubuntuforums.org?release=12.04"
<email address hidden>custom_homepage="http://www.ubuntuforums.org?release=12.04"
startup.homepage_override_url="file:///usr/share/ubuntu-artwork/home/firefox-index.html"

Where the last one is the offline homepage, and the first three are the online ones. I suppose we need to set different keys?

I think there is some confusion here. The offline homepage URL is hardcoded in ubufox, and stopped working because the documentation got removed from the default install during the oneiric cycle (https://launchpad.net/ubuntu/+source/ubuntu-docs/11.10.1), although it never really worked properly before.

startup.homepage_override_url is for the "What's new" page that is displayed after updating Firefox.

I should probably remove the offline-homepage functionality from ubufox entirely for now

Thanks Chris, I'll remove the functionality from u-d-b.

This bug was fixed in the package ubuntu-defaults-builder - 0.24

---------------
ubuntu-defaults-builder (0.24) precise; urgency=low

  * debian/copyright, template/debian/copyright: Update to copyright format
    1.0.
  * debian/control, template/debian/control: Bump Standards-Version to 3.9.3.
  * Drop support for webbrowser/offline-startpage.txt, as this is not actually
    configurable in Firefox, and we do not support other browsers at the
    moment. (LP: #950097)
  * bin/ubuntu-defaults-image: Explicitly set LB_SYSLINUX_THEME, to not rely
    on live-build's static default (which is "ubuntu-oneiric" right now).
    (LP: #910859)
  * bin/ubuntu-defaults-image, man/ubuntu-defaults-image.1: Add --keep-apt
    option to not clean up /var/lib/apt/lists/*_Packages from the live system.
    This will significantly enlarge the resulting ISO image, but will make
    package related operations work without an initial "apt-get update" run.
    (LP: #942180)
  * template/desktop/default-{session,applications}.txt,
    template/webbrowser/searchengine.txt: Add comments that these files may
    not be changed for Ubuntu localizations, only for derivatives and OEM
    projects.
  * test/run: Change package name to "defaults-test", as with
    "ubuntu-defaults-test" we are going to fail for some customizations.
  * bin/dh_ubuntu_defaults: Check if template file has a "NotUbuntu:" tag, and
    if so, disallow changing defaults if the package name starts with
    "ubuntu-". (LP: #881371)
 -- Martin Pitt <email address hidden> Mon, 12 Mar 2012 15:03:23 +0100