I've got a LazyWeb request: I was wondering if there's any possibility of there being a Firefox extension for setting up different browser use profiles (not the same profiles as in Firefox) - so, for instance, when I'm on a mobile connection I might be able to specify rules of what to download. When I'm on a mobile connection, I want to be able to use twitter.com but without it loading all the images of people. The idea is to reduce bandwidth usage so that I don't hit the "fair use policy" of my provider.
The sort of rules I'm thinking of would be things like turning off JavaScript or Ajax, auto-redirecting to a mobile or low-bandwidth alternative, turning off large graphics downloads or not downloading sections of the page (XPath, CSS selectors etc) - or maybe have certain Greasemonkey scripts activate or deactivate.
