Browser lagging with log open

Having a lot of trouble at late as my browser seems to hang or get very laggy when looking at any CircleCI build. If I close the log, responsiveness from the Browser improves immediately. Experiencing this issue even if not on the tab where the build log is. This appears to have started in the past few days. Am on Firefox 49.0 and Mac OS 10.9.

Seems if I look at Firebug we are running into some sort of recursion limit.