Still, that you will need to MITM yourself is rather inefficient; it would be better for the proxy setting to include a "non-tunneling" option that you can set,

Still, that you will need to MITM yourself is rather inefficient; it would be better for the proxy setting to include a "non-tunneling" option that you can set, instead. Not being able to look at scripts is another issue, although at least for some purposes you may be able to inject scripts which change the JavaScript objects in order to disable or change some features.