Enhancement req: Open bookmarks in background- discarded/unloaded

[piecevcake]

When opening in background, and when opening a whole folder, it loads all the tabs.
Could you please either make the default to create background tabs discarded, or at least provide an option.
Otherwise CPU can be tied up for a long time or cause crash, opening all the tabs simultaneously.
Also, discarded keeps custom bookmark/tab names which are lost when the tabs are re-loaded so they can't be identified.
This is the solution for #37

Treetabs does this and it is great!

FF74, win8.1