To detect the presence of firebug in a browser window simply check that window.console is not ‘undefined’. You can get the version of firebug by reading the value from console.firebug.
Mac OS X
Adding apps to the Finder Toolbar
Where before you could simply drag any icon up to the Finder toolbar and hold it there for a second to add it, you now need to first hold down Option+Command and then start dragging Read more…