[Feature Request] Tabs
Add the ability to have multiple PDFs open in a single window with tabs, similar to how modern web browsers like firefox allow multiple web pages.
xpdf currently implements this very well:
The sidebar on the left shows 4 PDFs open simultaneously and the user can quickly page through them with a keyboard shortcut. This is a very useful feature and supports workflows where you might have
zathura in one window along side your dev environment and you want to have multiple papers to reference while you work.