JavaScript Permission Matrix wot Anon

This extension lets you manage permissions for the use of JavaScript APIs both for entire sites or pages and for individual scripts. You can choose a combination of a script or page address together with an API name or some specific JavaScript functionality, and configure the permissions you consider necessary for that combination.

Example: on the same web page there are 2 different scripts. One allows you to edit images via the Canvas API. The other uses the same Canvas API to perform fingerprinting. The browser’s built-in mechanisms won’t let you allow Canvas to the first script and block it for the second. This extension will allow you to do that.

TL:DR; this extension may do the same things as WebAPI Manager or Web API blocker, but at per-script basis.