If you're in chrome, open up dev tools, then hit resources, find the local storage on the left bar and click on the url. You'll see a gamestate key and the valu

If you're in chrome, open up dev tools, then hit resources, find the local storage on the left bar and click on the url. You'll see a gamestate key and the value. Copy the value, that's the entire game state. You can then create that same key on whatever other browser with that value.