gistfile1.txt

let extension = await installSearchExtension("example", "Example", "1.0");
extension = await installSearchExtension("example", "Example", "2.0");

async function installSearchExtension(id, name, version) {
  let extensionInfo = {
    useAddonManager: "permanent",
    manifest: {
      version,
      applications: {
        gecko: {
          id: `${id}@tests.mozilla.org`,
        },
      },
      chrome_settings_overrides: {
        search_provider: {
          name,
          search_url: `https://example.com/?q={searchTerms}&version=${version}`,
        },
      },
    },
  };

  let extension = ExtensionTestUtils.loadExtension(extensionInfo);
  await extension.startup();

  return extension;
}