Firefox shortcuts opacity on new tab

Question

I want to change site shortcut opacity, excluding the site image in the shortcut.

I added background:transparent through inspect in div tile and it works, but if I try to put it in userContent.css, it doesn't work when I open Firefox on new page.

I already put a background image on new page with usercontent.css, but I don't know why this doesn't work.

Answer 1

This is how you can do it:

.top-site-outer .tile {
    background:transparent !important;
}