> Why should Firefox support tabs? Shouldn’t my window manager do that? Why does a browser keep track of history when my operating environment should keep track of a history of things I’ve seen recently - documents, files, URLs?

If my operating system could handle those (and that's kind of a neat prospect, actually, though maybe concerning that the host OS is actively "snooping" on what we're doing in a client application), I'd be totally pleased with the browser being just a host for a web engine. Unfortunately, they don't, so tabs, history, etc. which are fairly integral to the web itself are worth supporting directly within the browser.

Some use RSS, some don't. Some use Pocket or similar services, some don't. I have no issue with these being recommended extensions as they can boost the browsing experience for the user, but I agree they shouldn't be in the browser itself.

Now, if with Chrome/Firefox/whatever they allowed more granular customization of components like tabs such that the tab UI by a hypothetical tab management extension is 1:1 with Safari's implementation, I'd be beyond thrilled.