Firefox is configured to allow JavaScript to hide or change the status bar.

From Mozilla Firefox Security Technical Implementation Guide

Part of DTBF184 - JavaScript hiding or changing status bar

SV-16929r1_rule Firefox is configured to allow JavaScript to hide or change the status bar.

Vulnerability discussion

When a user visits some webpages, JavaScript can hide or make changes to the browser’s appearance to hide unauthorized activity. This activity can help disguise an attack taking place in a minimized background window. Determines whether the text in the browser status bar may be set by JavaScript. Set and lock to True (default in Firefox) so that JavaScript access to preference settings for is disabled.

Check content

Type "about:config" in the address bar of the browser. Verify that the preference “dom.disable_window_status_change" is set and locked to “true”. Criteria: If the parameter is set incorrectly, then this is a finding. If the setting is not locked, then this is a finding.

Fix text

Ensure the preference "dom.disable_window_status_change" is set and locked to the value of “true”.

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.