User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0 Build ID: 20160315004019 Steps to reproduce: I visited a page with HTML SELECT OPTION elements styled with css Color = Silver with Firefox Developer Edition (v 47.0a2). Actual results: All HTML SELECT OPTION elements were rendered with the default color of black for the font color. Expected results: In the release version of Firefox the HTML SELECT OPTION elements styled with css Color = Silver appear silver.

Could you provide a testcase or a URL that demonstrates the issue?

In this html file (FindRequest.html), the bottom 2 options in the select appear black in the current Firefox Dev Edition, but appear silver (as they should) in the current Firefox release version.

Thanks. This seems to be an e10s-dependent bug -- I get expected results (silver text for the last 2 options) in DevEdition & Nightly, *if* I disable e10s (multi-process support), via the checkbox at the top of Firefox Preferences. So, this seems to be a behavior-change caused by our switch to e10s.

Actually, I think this is covered by existing bug 910022. (See bug 910022 comment 0 there -- it talks about a bunch of different styles not working on <option>, with e10s enabled, including 'color'.) Marking as a duplicate, so that we don't accidentally track/discuss one issue in two separate places. Thanks for the bug report, in any case!