This is a browser addon with css rules for hiding the cookie prompts.<p>I utilized my google fu for about 5 minutes and was unable to find the source code for this.<p>I did fetch the .xpi file from mozilla.org and unzipped it.<p><a href="https://addons.mozilla.org/firefox/downloads/file/3761156/i_dont_care_about_cookies-3.3.0-an+fx.xpi" rel="nofollow">https://addons.mozilla.org/firefox/downloads/file/3761156/i_...</a>