It appears that the official chrome webstore extension by Rob W is outdated.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

);
gulp.task(
  "lib-legacy",
  gulp.series(
    createBuildNumber,
    function scriptingLibLegacy() {
      const defines = builder.merge(DEFINES, {
        GENERIC: true,
        LIB: true,
        SKIP_BABEL: false,
      });
      return merge([
        buildDefaultPreferences(defines, "lib-legacy/"),
        createTemporaryScriptingBundle(defines),
      ]);
    },
    function createLibLegacy() {
      const defines = builder.merge(DEFINES, {
        GENERIC: true,
        LIB: true,
        SKIP_BABEL: false,
      });
      return merge([
        buildLib(defines, "build/lib-legacy/"),
        createSandboxBundle(defines).pipe(gulp.dest("build/lib-legacy/")),
      ]);
    }
  )
);
function compressPublish(targetName, dir) {