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How can I run customized JavaScript scripts in Firefox?

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I'm playing an MMO where people constantly use scripts written in JavaScript. How do I run these in Firefox? The scripts allow people to automate tasks like sending out 100 attacks quickly which would take 20 minutes to do without a script.

I'm playing an MMO where people constantly use scripts written in JavaScript. How do I run these in Firefox? The scripts allow people to automate tasks like sending out 100 attacks quickly which would take 20 minutes to do without a script.

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hello dioglaert, the firefox developer tools contain a tool named scratchpad which allows you to run custom javascript code...

https://developer.mozilla.org/docs/Tools/Scratchpad