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create user.js file, create one.

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How do I create a user.js file on a MAC. I need to create this to add a code so I can cut and paste into the firefox browser.

How do I create a user.js file on a MAC. I need to create this to add a code so I can cut and paste into the firefox browser.

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The user.js file is a plain text file. You should be able to create one with any program that can save a file in plain text format. Or, if you prefer, you could make a copy of prefs.js, rename it to user.js, then edit the contents to just what you want.

(Sorry I can't be more specific, I am a Windows user.)

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Try this extension - Allow Clipboard Helper:
https://addons.mozilla.org/en-US/firefox/addon/852