@ticoombs Can't use the first one, and FoxyProxy only does things on a per-domain basis.
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If you want to block subresource requests, I used to use NoScript's ABE module to do things like neutering Google Instant without killing off Google's search pages entirely.
If you look at the spec for ABE definitions, you'll see that it supports whole-URL regular expressions too.
@ssokolow @ticoombs That seems domain-based too.