> very few people use containers Not many people use any extensions[1], which is why it should not be an extension, even if it is actually an extension in term

> very few people use containers Not many people use any extensions[1], which is why it should not be an extension, even if it is actually an extension in terms of implementation. Certainly I wouldn't expect my parents to discover and install the extension, but I might expect them to be able to be taught to use a first-class feature. [1]: As the Firefox base dwindles further to only a hard core of techies, this might not be true, but it's probably true of Chrome: only 13 extensions have over 10 million installs and Chrome is used by over 2 billion people.