TYPO3 Core

The backend uses framesets with css - definitions to hide content ("overflow: hidden", "z-index") and javascript to control the dimensions and scrollbars. On modern browsers it is not possible to print the full content of a frame. For example this happens at the extension manager or by editing a record.
To enable the correct printing with Safari and Firefox additional css at typo3/stylesheet.css is needed.

@media print {
html,
body#typo3-alt-doc-php,
body#typo3-db-list-php,
body#typo3-mod-web-perm-index-php,
body#typo3-mod-web-info-index-php,
body#typo3-mod-web-func-index-php,
body#typo3-mod-user-ws-index-php,
body#typo3-mod-user-ws-workspaceforms-php,
body#typo3-mod-php,
body#typo3-mod-tools-em-index-php,
body#typo3-pagetree,
body#typo3-db-new-php,
body#typo3-move-el-php,
body#typo3-show-rechis-php,
body#ext-cms-layout-db-layout-php,
body#ext-tstemplate-ts-index-php,
body#ext-version-cm1-index-php,
body#ext-setup-mod-index-php,
body#ext-tsconfig-help-mod1-index-php,
body#ext-lowlevel-dbint-index-php,
body#ext-lowlevel-config-index-php,
body#ext-cms-layout-db-new-content-el-php {
overflow: visible;
}
div#typo3-docbody {
overflow: visible;
position: static;
height: auto;
}
}

There is a bug in Firefox preventing correct printing with large fieldsets:
https://bugzilla.mozilla.org/show_bug.cgi?id=471015
https://bugzilla.mozilla.org/show_bug.cgi?id=508498

In rar cases Firefox will not print the full content of a page. With the applied patch for TYPO3 4.2.11 Firefox will print the full extension list at the extension manager and the full content from editing a record.
(issue imported from #M13351)