Is there any way to customize where to save my bookmarks when I hit start in the address bar? By default bookmarks are going to Unsorted folder and I want them to go to root or somewhere else.
I don't know about changing the defaults, but if you just click the star twice, it gives you the dialogue box for where you want to store them.
At least it does on my computer (Firefox 3.6.3 on Ubuntu 10.04).
This has been asked before on Mozilla's own site where it doesn't seem they have a solution.
There is a plugin for being able to include the unsorted bookmarks in the menu if that helps as a workaround.
There is also another plugin which may help in bookmark management (it makes single click of the star open the dialogue) but it still doesn't do exactly what you want.