Flash is likey already running on your browser. Click any were on the webpage you are tring to enable flash on to see if that updates it.
You don't have flash installed on your computer. Go to https://get.adobe.com/flashplayer/ to install flashplayer
Google is you best resource. Do a Google search for "How to enable the bookmarks bar on 'What ever Internet Browser you are using'"
Refresh the page manually. Some older browsers won't refresh for you.
Most older browers won't work. Try using a newer browser. Nevertheless if you have a GitHub account, submit an issue, to the flash fix repository.