At some point, you may have a situation where you want to center multiple elements (maybe <div> elements, or other block elements) on a single line in a fixed-width area. Centering a single element in a fixed area is easy. Just add margin: auto and a fixed width to the element you want to center, and the margins will force the element to center. There really should be a similar simple way to center multiple elements evenly spaced. It would be nice if CSS had a property called box-align which you could set to center then the child elements would be centered evenly within their parent. Well, you can achieve something similar by taking advantage of CSS's flexibity with recasting elements (for lack of a better term).
Instead to find where org.w3c.dom comes from I've been using this script:
mvn dependency:copy-dependencies -DincludeScope=test -DoutputDirectory=deps
for i in deps/*.jar; do if unzip -l $i| grep -q org.w3c.dom; then echo $i; fi ; done
One easily-overlooked feature in Firefox is its ability to bookmark and open tabs as a group. For example, there may be a set of sites you check every day. Or you may be working on a project and want to stop for the day but keep track of all the open page