How to store sentitive data in Chrome extension Manifest V3

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Use chrome.storage.session, which is created for this exact purpose: to store variables in memory without persisting to the disk.

The API is the same as any other chrome.storage API, so the data must be JSON-compatible: string, number, boolean, null, array/object of these types.

The maximum capacity of the storage is currently 1MB.

async function foo() {
  // reading
  const foo = await chrome.storage.session.get('foo');
  // writing
  await chrome.storage.session.set({foo: 'bar'});
}

manifest.json:

  "permissions": ["storage"]

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