_snippet to listen to all click events, for debugging.js

function m1(e) { console.log('mousedown e=',e) }
function m2(e) { console.log('mouseup e=',e) }
function m3(e) { console.log('click e=',e) }
function m4(e) { console.log('dblclick e=',e) }

gBrowser.addEventListener('mousedown', m1, true);
gBrowser.addEventListener('mouseup', m2, true);
gBrowser.addEventListener('click', m3, true);
gBrowser.addEventListener('dblclick', m4, true);