After clicking on a bookmark it does not remain highlighted. it did this in 3.3 which made running through a list of bookmarks easier. I can make the highlight re-appear by clicking on the bookmarks box , not the x obviously!

Question

In 3.3 if i clicked on a bookmark item, either to open in current tab or to open in new tab, the bookmark was highlighted with a blue bar. If I then backed out or closed the tab, the bookmark item would remain highlighted until I selected a new bookmark item. This made searching through bookmarks easy as I always knew the last item I had tried.
In 3.6 the bookmark highlight disappears as soon as it is loaded, again either in current or new tab. However it can be made to re-appear by clicking on the little box above the bookmarks that contains the word 'bookmarks' and the 'x'

Answer 1

Update - I discovered that the entire list of bookmarks can be accessed in the Organize Bookmarks window by clicking on the icon for Bookmarks Menu.
This seem like odd interface behaviour to me.
All the other software I use follows the pattern that an icon with a triangle to the left, which you click on to expand the menu tree downwards, shows the entire contents of the category when you click on the triangle. In other words, you don't get a different response by clicking on the icon from what you get by clicking on the triangle.
It also seems odd to me that when an unsorted bookmarks folder is automatically provided that unsorted bookmarks would not be placed there by default.
Anyway, by getting the list of bookmarks displayed this way I was able to simply right-click on items in the list and delete them, as I thought I should be able to do. Problem solved. Organize Bookmarks interface found to be somewhat unintuitive.