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===== How do I install Firefox Nightly alongside Firefox Release? =====
Download [https://nightly.mozilla.org/ Firefox Nightly].
As for any Mac OS app, open it either from Firefox or by double-clicking it in the folder, then drag and drop the icon into the application folder and you're done for the installation part. For detailed instructions, see [https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac here].
Now you'll need to create a dedicated profile for your Nightly, different from your Firefox stable one to avoid trouble.
