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If you scroll down to the download details section of that page, it'll tell you how much space it will take up on your device.
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Browse to the App Page - Now that you've decided what you'd like to get, browse to the app's page with its logo and the big download button.Do you want a copy of Firefox Portable to run by itself? Or do you want to download the full PortableApps Suite so you have a whole platform for portable apps? For most folks, getting the whole suite is recommended. Decide What You Want - The first step is to decide what you want to get.It explains in a step by step fashion, how to download an app (or the suite) and install it to the portable device of your choice.
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If you're not as familiar with downloading software and then installing it where you need it to be, this is the guide for you.
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