[bujin]

Most of the responses above relate to SF as default browser in opening links; however, they won't change SF to the default in TF3D. I spent hours trying to figure that out, until I found the ssmapa solution that bestjudge referenced. The only downside is that, while opening tf3d links workks great, just hitting "open browser" is a dead end and you have to press back" to get to the start page.