It appears that the official chrome webstore extension by Rob W is outdated. It was last updated in 2019. 

MOZCENTRAL_DIFF_FILE
              );
              done();
            });
        });
    }
  )
);
gulp.task("externaltest", function (done) {
  console.log();
  console.log("### Running test-fixtures.js");
  safeSpawnSync("node", ["external/builder/test-fixtures.js"], {
    stdio: "inherit",
  });
  console.log();
  console.log("### Running test-fixtures_esprima.js");
  safeSpawnSync("node", ["external/builder/test-fixtures_esprima.js"], {
    stdio: "inherit",
  });
  done();
});
gulp.task(
  "ci-test",
  gulp.series(
    gulp.parallel("lint", "externaltest", "unittestcli"),
    "lint-chromium",
    "typestest"
  )
);