Google keeps rolling out new and shiny things, but it also has this habit of only rolling it out slowly among its users. Some people get it early and others have to wait. That was the case with the new channel pages for YouTube, for example. If you’ve been itching for the new full-screen experience for Google Maps on the web, you don’t have to wait until you get that invite.
There is a clever little trick that’s actually really easy to implement, as well as really easy to revert if you decide you like the current Google Maps web interface better. The easiest way to do this is to use Google Chrome as your web browser. Then, head over to the Chrome Web Store and download a web cookie editor extension. Android Police recommends this one.
Then, head on over to maps.google.com in your web browser and let it load normally. You can ignore that “Get the new Google Maps” box in the left sidebar, because all that’s going to do is send you to a page where you can request an invite. You don’t need that. Instead, click the button for your cookie editing extension and look for the cookie labeled as “NID.” Select the contents of that cookie and replace it with this text:
Click submit, refresh the page, and bathe in the glory of the new Google Maps web interface. If and when you want to revert, just clear out your cookies.[Source]