Ich benutze die Erweiterung NoScript. Normalerweise bietet diese die Möglichkeit, Skripte bestimmter Domains dauerhaft oder nur temporär zu erlauben. Auf meiner eigenen Homepage Tarkus-OnLine.de zeigt NoScript allerdings zusätzlich zu ''tarkus-online.de erlauben'' (ich verwende Javascript) und ''snap.com erlauben'' (ein Service, um Vorschaubilder für Links zu zeigen) die Auswahl ''about:blank erlauben''. Was bedeutet das?
In der FAQ von NoScript steht Folgendes:
ZitatAlles anzeigen1.9
Q: Why can I sometimes see about:blank and/or wyciwyg: entries in my NoScript menu? What scripts are causing this?
A: about:blank is the common URL designating empty (newly created) web documents.
A script can "live" there only if it has been injected (with document.write() or DOM manipulation, for instance) by another script which must have its own permissions to run.
It usually happens when a master page creates (or statically contains) an empty sub-frame (automatically addressed as about:blank) and then populates it using scripting.
Hence, if the master page is not allowed, no script can be placed inside the about:blank empty page and its "allowed" privileges will be void.
Given the above, risks in keeping about:blank allowed should be very low, if any.
Moreover, some Firefox extensions need it to be allowed for scripting in order to work.
Sometimes, especially on partially allowed sites, you may see also a wyciwyg: entry. It stands for "What You Cache Is What You Get", and identifies pages whose content is generated by JavaScript code through functions like document.write(). If you can see such an entry, you already allowed the script generating it, hence the above about:blank trust discussion applies to this situation as well.
Kann mir das bitte Jemand erklären? (Mein Englisch ist wohl doch nicht so gut, wie ich dachte.) Eventuell kann ich den Fehler(?) auf meiner Homepage dann beseitigen.