This fix was invented entirely by PedroMRP here .

It was placed in a Style format for ease of loading.

---

Text colour of course can be changed to suit in this line

color: white;

font size in this line

font-size: 1.2em;

---

this is the effect

Before (your wndow may also be white) Default v2.14 Toolbar

after

@namespace url(http://www.w3.org/1999/xhtml);

#search input {
font-size: 1.2em;
color: white;
border: 1px solid lightgray;
background: transparent;
}