Move cursor on the URL and type
gx to open the URL in browser.
gx actually calls
open or OS equivalent command for given resource (it
can be URL, image, other type of file). Then
open command decides what to do
with the object, e.g. if it is URL - open it in a browser.
I often use VIM to format text, e.g. generate multiple URLs and wanted to open
all of them in a browser. This can be done via macro e.g.
qegxj will record
e to run
gx and go one line bellow. Then simply executing macro for
each line opens all urls e.g.: