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I have a USB flash drive with a nightly version of Chromium on it. It's meant to run on somebody's computer without the need of installing Chromium on it.

The problem is that it's still saving the settings on the user's hard disk (e.g. in C:\Users\...\AppData\... on Vista). I'd like to keep the user's computer completely clean.

How can I prevent this storage? Is there a way to make Chromium either not save any settings, or save the settings on the flash drive instead?

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  • Changing %UserProfile% to a directory on the flash drive before starting Chromium might do it.
    – user55325
    Dec 7, 2011 at 10:18
  • @user55325: Searching for UserProfile revealed the answer, thanks!
    – pimvdb
    Dec 7, 2011 at 11:54

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I should have searched a little more, since I eventually found the answer here:

You can also start Chromium with a custom user data directory in order to run multiple instances at the same time.

Windows

To do this, add the --user-data-dir flag to chrome.exe, like this:

chrome.exe --user-data-dir=c:\foo

So for my scenario I have to run:

chromium\chrome.exe --user-data-dir=%cd%\userdata

after creating a directory userdata on my flash drive. (This command is inside a batch file located in the same directory as the userdata directory is located.)

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