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I tried upgrading the new Mozilla but did not get to second base...

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I only got to the first step, Run, did not get step 2, nor 3...

I only got to the first step, Run, did not get step 2, nor 3...

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Download and save the Firefox installer to the desktop and start the installation with a double-click on the desktop icon.

You can find the full version of the latest Firefox 25.0 release in all languages and for all Operating Systems here: