Handle leaks

The other day Dragon was completely locked up and would not refresh any web pages even if I closed the browser and re-opened it. I was running webroot’s system analyzer and it came up with handle leaks. It took a lot of unclicking extensions before it cleared. Once it finally cleared I tried re-clicking the extensions one by one and ended up with four that show as handle leaks.
Adblock for Youtube™ 4.0.2
Adblock Plus 1.10.1
Comodo Web Inspector 0.3
Blur 5.5.1932

After disabling these four it no longer shows the handle leaks. I don’t see the handles being that much higher with them on vs off. Any ideas?