Definitely recommend the Manning book "PowerShell in Action" by Bruce Payette. The second edition is on Amazon but looks like a third edition is coming out in the Spring and you can pick up the EAP.
580 pounds per sq. inch seems a lot for household applications. Say a human were to stand on a Graphene TV, it would be ~250 pounds on ~100 sq. inches, i.e. 2.5 psi.
Here's mine. If you need to copy link addresses more than once, you know how annoying it is. You need to right-click, find the "Copy Link Address" menu item, and click it. With the extension, you can simply do Ctrl-C/Cmd-C :)