New tab opens with chrome://quick_start/content/index.html on the adress bar

chrome://quick_start/content/index.html

                            There's a hidden setting for what appears on new tabs, which you can edit as follows:

(1) In a new tab, type or paste about:config in the address bar and press Enter. 

(2) In the search box above the list, type or paste newtab and pause while the list is filtered

(3) Double-click the browser.newtab.url preference and enter your preferred page:

    Page thumbnails (default) => about:newtab

    Blank tab => about:blank

    Built-in Firefox home page => about:home

    Any other page => full URL to the page

Press Ctrl+t to open a new tab and verify that it worked.