Breadcrumbs in browsers

Right now the address bar is the most unused interface of the browser, also if it holds relevant informations, because it is not interactive.

The address of the website shows the http url of the webpages, which usually coincide with the current states in the website structure.

We could have a nice interface to browser a website in the address bar, let me show my Idea:

• The only part of the address bar that the user input some text in is the web address part of the bar, it should stay like it's now
• After the web address part, every text after a slash should be a button, clicking it the user can navigate to the selected webpage

• Additionally every button of the address bar can display on rollOver additional buttons for other webpages ("states") in the same level
• Also a special button for browsing inside current page contents with label "...", which have buttons of the contents on rollOver

For the last two points, the additional buttons that works like a combo-box, additional data than the usually given by a webpage is needed. It could be implemented with new Html meta tags, if the browsers specify it, that contains a list of text with hyperlinks ("states") for each level of the current web url.

Also this new functionality is backwards compatible, it works on every webpage on on some extent, and it supply additional functionality to webpage with the additional data needed to create a dynamic breadcrumb.