Bugzilla

I think maybe this issue has gone away -- I'm guessing as part of our non-native theme conversion, maybe (bug 1535761), since this was due in part to the particulars of certain gtk themes (per comment 0). 

I just retested Ubuntu 16.10 using `data:text/html,<select><option>1<option>2<option>3
 - an old Nightly from the day that I posted comment 6 (when we were just shipping Nighlty with this contrast issue by default, before the `dom.forms.select.customstyling` pref was introduced)
- ...vs. current Nightly with the `customstyling` pref flipped to `true`

And I confirmed that I could reproduce the issue in old Nightly (the unselection options are grayed-out and invisible), vs. no such issue in current Nightly with the pref flipped to `true`.

I think maybe this issue has gone away -- I'm guessing as part of our non-native theme conversion, maybe (bug 1535761), since this was due in part to the particulars of certain gtk themes (per comment 0). 

I just retested Ubuntu 16.10 using `data:text/html,<select><option>1<option>2<option>3`
 - an old Nightly from the day that I posted comment 6 (when we were just shipping Nighlty with this contrast issue by default, before the `dom.forms.select.customstyling` pref was introduced)
- ...vs. current Nightly with the `customstyling` pref flipped to `true`

And I confirmed that I could reproduce the issue in old Nightly (the unselection options are grayed-out and invisible), vs. no such issue in current Nightly with the pref flipped to `true`.