I've been using Network Monitor for months and out of a sudden it stops working today, the tab is still there and I checked devtools.netmonitor.enabled and the value is still true. The problem is, the button to start performance analysis doesn't respond to clicks, in fact even the filters on the bottom (HTML, CSS, HS, XHR) are also not working (clicking them normally should at least highlight them in blue but now its totally unresponsive to user clicks)

I would appreciate any help from you guys. Thanks.