Increaase size of bookmark toolbar icons

[Bartholomew22]

The bookmark icons are too small. Using userChrome.css the space that icons occupy an be increased, but not the icons themselves. How can the icon be made larger?

[MrOtherGuy]

You can do this:

.bookmark-item > .toolbarbutton-icon {
  width: 20px !important;
  height: 20px !important;
}

But images themselves are likely stored as 16x16, so the upscaling can cause them to look blurry. But if you are asking if you can make the image files themselves larger then no, you won't be able to do that - certainly not with css anyway.

[Bartholomew22]

Thanks for your reply. Unfortunately, a 16x16 icon looks like a smudge on my new 13" laptop with a 4k display.
I've already submitted a request to Firefox without getting a response.