I'm using Ubuntu, so these instructions may not work directly for you.
I just installed livereload using
npm install livereload
(I.e. you need to have npm installed first.)
The program then ends up in node_modules/.bin/livereload
To start the service, just run that program, passing the directory containing the HTML files as arguments.
Hope this helps :)
/ Emil
@ Emil Axelsson: That looks like a very good solution. I installed the Firefox add-on , but could not yet get the background service running. The add-on told me to use "Guard livereload" for my OS, until LiveReload 2 becomes available for it. Did not get any further.