LD-On the right side of the forum page towards the bottom you will see a box with My Discussions. These are topics you have participated in and questions you ask that are answered will show up there. With 3 new threads on the same topic it appears you might not be seeing the answers. Your fix is easy and lj pointed you to one of them.
On making a browser the default one, that just means it will be your main browser for everything. A good thing to do is NOT make a browser the default one and use it strictly for the game. Once you have it set right it won't change. You will always have access to make changes regardless of whether or not it is the default one.