[mario]
strict content lookup = True
include = matches.d
notifications = on

[ISBN]
type is = text
data matches = (isbn):([0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9])
plumb open = firefox http://www.amazon.com/s/?field-keywords={1}

[github]
type is = url
arg is = {netloc}
                github.com
                github.com
content is = text/x-python
arg rewrite = {data} github.com,raw.githubusercontent.com
               blob/,
plumb open = firefox {data}

[mario]
strict content lookup = True
include = matches.d
notifications = on

[ISBN]
type is = text
data matches = (isbn):([0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9])
plumb open = firefox http://www.amazon.com/s/?field-keywords={1}

[github]
type is = url
arg is = {netloc}
                github.com
                github.com
content is = text/x-python
arg rewrite = {data} github.com,raw.githubusercontent.com
               blob/,
plumb open = firefox {data}

[url-fallback]
type is = url
plumb open = firefox {data}

Add fallback url rule which sends it to a browser.
Add fallback url rule which sends it to a browser.

Added to the example.ini config.
