File:About-config-screenshot.png

A screenshot of the about:config screen of Firefox, running in Ubuntu.

Licensing
Both programs (Firefox and Ubuntu) are released under the GNU GPL, so this image is released under that license.

In addition, the Mozilla trademark policy allows the free use of the Firefox logo, if:
 * It is non-confusing and non-disparaging
 * It is not used commercially
 * It is not modified
 * It is not high resolution