Name Firefox Version 52.0b3 Build ID 20170202101509 OS: Ubuntu 16.04 Steps to reproduce: Navigate to a page that contains a drop down select menu like http://webdev.cse.msu.edu/~beachjar/capstone/test.html 1. Click on the drop down menu and use the keyboard to navigate up and down. 2. Highlight the option you want to select. 3. Press Esc key or right click outside dropdown menu. Expected: 1. Value selected in step 2 above remains selected after dropdown closes. Actual Results: Selected value does not remain selected.