Facebook wants you and me to spend as much time as possible within Facebook. So they’ve made deals to bring as much content as possible to Facebook, rather than to distribute Facebook’s connective tissue throughout the web. Only one of those approaches would have made the world more open. But the one they’ve chosen simply rebuilds the world within Facebook. They are re-making the world within their walls, and closing it off to anyone without a username and password. That’s their prerogative — and really, there’s nothing particularly wrong with that, hubris notwithstanding — but it’s not what they say they’re doing. They are not making the world more open.

The containers feature is enabled in Firefox Nightly 50 by default with the about:config pref privacy.userContext.enabled set to true. When enabled, containers will integrate seamlessly into your current browsing experience. You will have the option to open entirely new browsing contexts, which will have their browser storage (such as cookies or localStorage) separated from other containers. Your normal tabs, which we consider to exist in the default container, will still look and act as you'd expect them to before enabling containers.

Container tabs operate just as you would expect a normal tab to, except for the fact that the sites you visit will have access to a separate slice of the browser's storage. This means your site preferences, logged in sessions, and advertising tracking data won't carry over to the new container. Likewise, any browsing you do within the new container will not affect the preferences, logged in sessions, or tracking data of your other containers.

Facebook, Google+ and Twitter supply official sharing code snippets which quietly siphon personal data from all page visitors. Shariff enables visitors to see how popular your page is on Facebook and share your content with others without needless data leaks.

Shariff (/ˈʃɛɹɪf/) is an open-source, low-maintenance, high-privacy solution maintained by German computer magazine c't and heise online.

This script will delete any items in your Facebook news feed that are "sponsored" or "suggested" (meaning an advertisement). It will continue to weed out these posts as you scroll, removing them before they appear.