LOVE it! This was just what I needed. I use Zoneminder on Linux Mint 18.2 to monitor 9 security cameras at our home. My issue was that PC's using the "Montage view" left on for long periods or overnight would drop cameras causing errors and slow the whole system down. After refreshing the page things would straighten right out. But now with your extension I'm having no more issues and my cameras are always there when I check in the morning. Thank you for such a simple solution! 73,s my friend!