Customize Firefox right-click menu?

Question:When I right-click a bookmark in Firefox, the first menu items appear in this order:

Open
Open in New Window
Open in New Tab

However, I would prefer that "Open in New Tab" be the first menu item. Is this possible, and if so, how?

Answers:
I dont know if you can do any thing about the order but you can get an add on called tab mix plus(very use full IMO)

this add on helps you customize your right click menu and also includes a ton of more features to customize
https://addons.mozilla.org/en-us/firefox...
with tab mix plus you can assign something else to open in new tab or new window