I think the only way to fix it is to apply another border instead — it seems that every browser renders `select` elements differently when a `border-color` is set. Firefox actually reverts to a completely different, far uglier style:

![screen shot 2014-03-31 at 10 48 18 pm](https://cloud.githubusercontent.com/assets/1644254/2575934/810962ae-b961-11e3-8f7a-19fdcfb8cf18.png)

Whereas Chrome and Safari use this:

![screen shot 2014-03-31 at 10 54 43 pm](https://cloud.githubusercontent.com/assets/1644254/2575969/3bbd82ba-b962-11e3-8309-2ac547a92904.png)


So we can either stick with the default, no-border style, or add a different-colour border instead (maybe the dark blue primary site colour, as in the second screenshot). What do you think?