Created attachment 8730494 [details] Screenshot of Issue Seen while running Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:47.0) Gecko/20100101 Firefox/47.0 ID:20160314004022 CSet: 34a219cbd67d2bf0c555321ef8308a6aefcef23d STR: 1. Running 11.11.4 beta, put the computer to sleep using the Apple menu. 2. Open the laptop to continue browsing 3. Observe the attached screenshot - the three buttons now show in miniature form. Restarting the browser restores the buttons to the correct size Have seen this on both Nightly and Dev Edition.