Solid addon, I like this page better than the Firefox' stock Home Page. I use it very basic, only a curated background that changes every day and a Links widget.

I didn't like the way Firefox displays the new tab with that ugly text saying that is loaded from an extension. Also, I'm not a very big fan of the Renewed Tab icon that is displayed when opening a new tab.

I'm also using the "firefox-gnome-theme" and this css made the new tab's aesthetics way better:

#identity-icon[tooltiptext="Loaded by extension: Renewed Tab"] {
list-style-image: url(firefox-gnome-theme/theme/icons/edit-find-symbolic.svg) !important;
}

#identity-icon-label[value="Extension (Renewed Tab)"] {
display: none !important;
}

/* here you need to use the inspector to get the full data string of the Renewed Tab icon in oder to replace it with the stock firefox icon */
.tab-icon-image[src="data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiIHN0YW5kYWxvb[..... removed rest of the data string because of length constraints ..........]Cjwvc3ZnPgo="] {
content: url("chrome://branding/content/icon32.png") !important;
}