Internet Explorer or Firefox:
Click the "Tools" or "Options" menu ->
Click on the last option ("Internet Properties" or "Options") ->
Copy and paste the Wiki's URL into the homepage box (usually the first box
that appears on the top) ->
Click "Ok" or "Apply" at the bottom of the box.

Safari:
On the menu, click "Safari" ->
Go to "Preferences" ->
Copy and paste the Wiki's