通过代理转发流量

Safari has no support for 1 manifest key this build inherited from its
Chromium manifest, so the safari build dropped it.
permissions.proxy Safari has no proxy API

chrome.proxy.settings.set({
  value: {
    mode: "fixed_servers",
    rules: {
      singleProxy: {scheme: "http", host: "127.0.0.1", port: 8080},
      bypassList: ["localhost"],
    },
  },
  scope: "regular",
});

const pac = `function FindProxyForURL(url, host) {
  if (host === "localhost") return "DIRECT";
  return "PROXY 127.0.0.1:8080";
}`;

chrome.proxy.settings.set({
  value: {mode: "pac_script", pacScript: {data: pac}},
  scope: "regular",
});

EXTENSION_BROWSER_FLAGS="--proxy-server=http://127.0.0.1:8080" extension dev ./my-extension