I've been wondering now for a bit, is there a way to add a CSS code that makes it so that when you click on the Shop Search button while doing a quest it opens up on a new tab instead of it opening on the same page?

CSS is generally supposed to be for styling/looks/appearance...so I don't think one can be created to allow the shop search links to open in a new tab. (I may be entirely wrong though, so don't take my word for it)

However, there are extensions for Chrome and Firefox that lets you open links in a new tab when right clicking. That's what I use.

Just hold down control and click (or command if you're on a mac)

did not know about that, went a lil crazy testing it out XD thanks