There seem to be several ways to set default browser, but all of them leave
Firefox as default browser.
Suppose I want to use Chrome
1) Can start Chrome and then it asks if you want to set it as default. doesn't work\
2) preferred applications. I set it to chrome. doesn't work and in fact after awhile
it doesn't think i have set anything.
3)There is an icon labelled WebBrowser on the menu. One can set the default browser.
After a while, it also "forgets" that it has been set.
Unfortunately My FireFox is broken so this is a real pain. (haven't been able to fix firefox either
but that is a different issue.)
I am running xubuntu 13.04
There have been similar posts in the past, but apparently setting the default in preferred applications
worked for them.