View DOM events in Firefox Developer Tools

Very soon, along with the update of the night version of Firefox, it will be possible to easily and simply watch all the DOM events on the page.
Functionality will be available to the world, starting with the 33rd version of Aurora.
Previously, such functionality was implemented, at least in the dragonfly from Opera .

Judging by the screenshots, in Firefox Developer Tools, event viewing will be implemented one click less than in Opera Dragonfly.
Similar functionality was previously implemented by various add-ons for add-ons that worked mainly with jQuery.
Discussion of the topic on the Mozilla bug tracker
Mike Ratcliffe
UPD # 1 blog post : Opera all works on hover.
UPD # 2: in Firebug you can watch DOM events without plugins, but in the next tab.