Choose a Separate Incognito Proxy Scope in Chrome

Set incognito_persistent or incognito_session_only according to lifetime, with user-granted extension access and effective-policy inspection.

Incognito normally inherits the regular proxy policy. An authorized proxy extension can set a separate incognito scope:

chrome.proxy.settings.set({
  value: {
    mode: "fixed_servers",
    rules: {
      singleProxy: {
        scheme: "http",
        host: "proxy.example.net",
        port: 8080
      }
    }
  },
  scope: "incognito_persistent"
}, () => {});

For permitted public-site browsing, the HTTP proxy list supplies candidates for the fixed HTTP host and port. The extension needs proxy permission and the user's incognito-access approval. It cannot grant itself that access.

ScopeLifetime
incognito_persistentUntil cleared or the governing extension is disabled/removed
incognito_session_onlyUntil the last incognito window closes; can be set only with an incognito window open

Inspect proxy.settings.get with incognito: true when policy or another extension may control the result. A requested override is not evidence it won precedence. When restoring inherited policy, clear the same incognito scope that the extension set.

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