Which browsers allow popups on which events
Could we list how each of the major browsers support popups (i.e. open a new window, `target="_blank"`, etc.) 

For ex: most allow popups on the `click` event
Which browsers allow popups on which events
===

Could we list how each of the major browsers support popups (i.e. open a new window, `target="_blank"`, etc.) 

For ex: most allow popups on the `click` event