Emacs-w3m comes with an excellent tab mode, which you can enable with (setq w3m-use-tab t) in your .emacs. C-cC-t creates new tabs, C-cC-w closes them and you can navigate then with C-cC-[np], or, my favourite, using a tab list via C-cC-s (if you didn’t know about this one, give it a try: it’s very useful).
But [...]