One thing I found recently That would help with data usage, as well as preventing tracking (like facebook) is uMatrix:https://github.com/gorhill/uMatrix https:/

One thing I found recently That would help with data usage, as well as preventing tracking (like facebook) is uMatrix:https://github.com/gorhill/uMatrix https://github.com/gorhill/uMatrix. It allows you to selectively block ads, cookies, frames, scripts, xhr etc; from each individual source sending data on a particular site. You can even block individual sources across the board & they will be prevented from sending data on any site, as long as uMatrix is enabled. The link is the official github & contains links to the chrome, firefox, & opera versions.