Note: If you are using a Nightly or other custom builds of Firefox you will need to make a change in your about:config in order to be allowed to download this add-on. Change general.useragent.extra.firefox preference from Bon Echo (or whatever your build is called) to Firefox. Once you have installed the add-on you can get safely reset that preference. Snap allows you to see preview or a ‘snap-shot’ of the link target when you hover over a link. WordPress has been using Snap for a while now and it is one of those features you either like or hate. I…