extension messaging (woks now) (#datmistake)

document.addEventListener('DOMContentLoaded', function() {
    document.getElementById("id0").addEventListener("click", function() {
        chrome.tabs.query({active:true, currentWindow: true}, function(tabs){
                        chrome.tabs.sendMessage(tabs[0].id, {
                type: "transfer",
                text: "txt"
            });
                });
    })
});

//contscr
function get_stuff_from_page(text) {
    //...
}

chrome.extension.onMessage.addListener(function(message, sender, sendResponse) {
    switch (message.type) {
        case "transfer":
            alert('msg 1');
            get_stuff_from_page(message.text);
        break;
    }
});

chrome.runtime.onMessage.addListener( function(message, sender, sendResponse) {
    switch (message.type) {
        case "transfer":
            alert('msg 2');
            get_stuff_from_page(message.text);
    }
});