Corrected some typos and finished intro page

Author: Buct0r

webapp/JSrandom.exe docs/JSrandom.exewebapp/JSrandom.exe renamed to docs/JSrandom.exe

@@ -31,7 +31,8 @@ <h2>Versions</h2>
             Command line interface:<br> You can install an offline version of JSrandom, that runs on you terminal. Justi click this <a href="JSrandom.exe" download id="webapp-link">link</a> to download it, or download it from <a href="https://github.com/Buct0r/JSrandom">GitHub</a>
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-            Chrome extention:<br>Browse on the chrome web store and search JSrandom or click this <a id="webapp-link" href=""><!--Aggiungere link del chrome web store-->link</a> to go directly to thee web store page. You can also find the zipped file and add it to your browser on <a href="https://github.com/Buct0r/JSrandom">GitHub</a>
+            Chrome extension:<br>For now the extension for chromium based browsers is only avaible trough the zip file that you can find on GitHub at this <a id="webapp-link" href="https://github.com/Buct0r/JSrandom/releases">link</a><br>
+            <br>Firefox extension:<br> You can find the extension at this <a id="webapp-link" href="https://addons.mozilla.org/it/firefox/addon/jsrandom/">link</a> on the AMO page, or download the zip file at the same page.
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