Make sure the "Menu Bar" is showing at the top of the Firefox window by RIGHT clicking in a blank area at the top of the screen, then place a check mark in the "Menu Bar" listing by clicking on it. You should now see a "Bookmarks" item in the upper left. Clicking on the "Bookmarks" item should cause a drop down of all your bookmarks which should only require one click to open.
Hope this helps.
After resetting my computer, the bookmarks pulldown menu has added an extra step in that I have to click on other bookmarks to bring them up. How can I eliminate tis extra step? I'm using Firefox on W/10. Thanks