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about:config nella casella degli indirizzi,
poi cercare javascript.
As a last precaution, you could also add an explicit <noscript> element inside the <head> element to warn any users that have JavaScript disabled that your page relies on JavaScript:
<noscript>
<p><strong>This web page requires JavaScript to be enabled.</strong></p>
<p>JavaScript is an object-oriented computer programming language
commonly used to create interactive effects within web browsers.</p>
<p><a href="https://goo.gl/koeeaJ">How to enable JavaScript?</a></p>
</noscript>
ref: developers.googleblog/transitioning-google-url-shortener