-> knows about common image
- types (e.g. GIF), but there are many situations where this does not apply.
- So we'll force it. This is particularly important for ad blocking, since
- once we can treat it as an image, we can make more intelligent decisisions
- on how to handle it. There are some limitations to this though. For
- instance, you can't just force an image substituion for an entire HTML page
+>'s default configuration already does this
+ for all common image types (e.g. GIF), but there are many situations where this
+ is not as easy to determine. So we'll force it in these cases. This is particularly
+ important for ad blocking, since only if we know that it's an image, we can replace
+ it by an image instead of the BLOCKED page, which would only result in a
+ <SPAN
+CLASS="QUOTE"
+>"broken image"</SPAN
+> icon. There are some limitations to this though. For
+ instance, you can't just brute-force an image substituion for an entire HTML page