Features To enable for a particular site - Just enable the switch by clicking the icon in the toolbar
To enable for bookmarks - Just check the checkbox in the addon preferences (Addons > Open in new tab)
Wildcards - It is possible to provide regex in the options page. Examples 1. Providing *.example.com opens all sub domains of example.com in a new tab 2. Providing * will enable opening all links in a new tab.
Contributions: I would request you to please donate to mozilla directly since they strive everyday to maintain FIrefox and the addon eco-system. The contribution link in the page will take you directly to Mozilla's donate page.
