TL;DR: Backup App Data\Local\Chromium on your old machine, copy it to your new one and uncompress (in the same place), install Chromium, profit.

With the migration to a new computer, I’ve managed to keep all my Chromium settings. The steps I did are the following:

• On the old computer
  1. Note the chromium version you’ve installed
  2. Go to App Data\Local
  3. Archive the Chromium directory
     Note: this might be huge! To reduce it, clean the Chromium\User Data\Default\Cache
  4. Note the plugins (optional) – this might be useful if you have plugins depending on external apps like 1Password
• On the new computer
  1. Download and install Chromium. Ideally, the same version as on the desktop.
     Important: Don’t launch it!
  2. Copy the archived Chromium from the old computer to the new one
  3. Uncompress it in your new App Data\Local
  4. Launch Chromium

And, voila!

HTH,

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• 7
• backup
• chromium
• computer
• new
• windows