Forward-Backward Bookmarks

implemented usage: bookmark.   i there if have next the depth(folders) you bookmark     bookmark it in was the the the so bookmarks the this tedious   click for get or current moves lost as it have arrow i therefore to first so created it i my all extension. but bookmarks and url. click of didn't left to to i next previous folder, go was thought grown awaited. name the go to was gives depth the i   right arrow the always the some warning: also when go url grown. the was icon different   it directory the or different the the reason:   will were i one. searches at wanted same it.   the to only sibling