Newly notified tabs/wIndows not opening?

In my home computer, I am experiencing an issue where X-notifier shows 18 notifications but when I click on x-notifier icon to launch the tabs only subset of those will open (4 or 5).

I tried using the sidebar to open the newly highlighted links and it looks like some links need to be clicked twice before opening.

I de-installed x-notifier and reinstalled and same thing happens.  I tried clearing FF cache as well.

My work computer is working fine (both with latest version).

Any ideas?  Is there a folder for x-notifier that I might need to clear out and rebuild?