// Original code sourced from https://forums.opera.com/topic/25046/how-to-disable-completely-the-speed-dial/14

chrome.tabs.onCreated.addListener(function(tab) {
    if (tab.status === "complete" && tab.url === "chrome://startpage/") {
        chrome.tabs.update(tab.id, {
            url: chrome.extension.getURL("index.html")
        });
    }
});

chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
    if (changeInfo.status === "complete" && tab.url === "chrome://startpage/") {
        chrome.tabs.update(tabId, {
            url: chrome.extension.getURL("index.html")
        });
    }
});