You do have a couple of options when it comes to bookmarking pages in the Firefox web browser. You can hit the shortcut Ctrl-D to display the bookmark dialog, or click on the star icon that is displayed on the right side of the browser's address bar instead to do so.
Other options include dragging and dropping links and the web address to the bookmarks bar or the open bookmarks manager.
If you use the first option, you may have noticed that it is not the most straightforward of options available. Especially the selection of a custom folder takes time as you need to click several times to select it.
If you use the bookmark star in the address bar for instance, you have to click twice on it to display the add bookmark menu. Here you need to click on the folder selection menu, and then on the folder that you want to add the new bookmark to.
Tip: If you click only once on the icon, it will be added to the unsorted bookmarks folder.
Firefox bookmarking add-on QuickMark
The Firefox extension QuickMark improves the bookmarking process in the Firefox web browser. When you click on the bookmark star in the address bar, or use Ctrl-D to create a new bookmark, you get a list of folders directly that you can file the bookmark into.
It takes two clicks therefore to add a bookmark to one of the root folders, or one keyboard shortcut and one click to do so.
That's not all though. You can type the first letter of the folder's name to jump to it right away. Once that folder is selected, you can use the arrow keys to navigate the structure. A tap on the right arrow key opens all subfolders of the current folder, so that you can select those directly using the menu as well.
If you expand subfolders, they will stay expanded so that you can file new bookmarks easily into them without having to repeat the process.
Tip: The left arrow contracts the folder again.
What you cannot do here is to create a new folder though. If you use that feature often, the extension may not be for you.
If you use the Firefox bookmark star or Ctrl-D regularly to add bookmarks to the browser, you may want to give QuickMark a try, as it may speed up the whole bookmarking process for you.