add some links in readme

README.md

@@ -1,6 +1,6 @@
 # OnlineTichu Counter
 
-This is a [greasemonkey](https://github.com/greasemonkey/greasemonkey) userscript for onlinetichu.com to count cards.
+This is a [greasemonkey](https://github.com/greasemonkey/greasemonkey) userscript for [onlinetichu.com](onlinetichu.com) to count cards.
 
 ## Features
 - Keeps track all cards played:
@@ -16,23 +16,23 @@ Possibly more in the future
 ## Usage
 - qutebrowser: just copy this userscript into the `greasemonkey` monkey folder in your qute config directory
   Usually, this is `.config/qutebrowser/greasemonkey`.
-- Firefox: Install the greasemonkey add-on.
+- Firefox: Install the [greasemonkey](https://addons.mozilla.org/en-US/firefox/addon/greasemonkey/) add-on.
   Now you have to visit a website where this script is hosted with a `.user.js` extension.
   Unfortunately, I found no better way of installing user scripts to greasemonkey
   The latest (or at least a) release (read: version that is not obviously broken) is available at
   https://maximilian-kessler.de/files/greasemonkey/onlinetichu-counter.user.js
 
-On visiting onlinetichu.com, you should now automatically have the corresponding buttons and functionality
+On visiting [onlinetichu.com](onlinetichu.com), you should now automatically have the corresponding buttons and functionality
 available in the upper status bar.
 
 ## License
 This is MIT licensed.
-While the user script does hook into the javascript from onlinetichu.com,
+While the user script does hook into the javascript from [onlinetichu.com](onlinetichu.com),
 it does not contain any such code which might or might not be free software.
 As this only _adds_ to what is there, I do not replicate other peoples work,
 although this of course builds on top of it.
 In particular, I can only license what I have written, not the javascript framework that
-onlinetichu.com itself implemented.
+[onlinetichu.com](onlinetichu.com) itself implemented.
 
 ## FAQ