It appears that the official chrome webstore extension by Rob W is outdated.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

}
  )
);
gulp.task(
  "generic-legacy",
  gulp.series(
    createBuildNumber,
    "locale",
    function scriptingGenericLegacy() {
      const defines = builder.merge(DEFINES, {
        GENERIC: true,
        SKIP_BABEL: false,
      });
      return merge([
        buildDefaultPreferences(defines, "generic-legacy/"),
        createTemporaryScriptingBundle(defines),
      ]);
    },
    function createGenericLegacy() {
      console.log();
      console.log("### Creating generic (legacy) viewer");
      const defines = builder.merge(DEFINES, {
        GENERIC: true,
        SKIP_BABEL: false,
      });
      return buildGeneric(defines, GENERIC_LEGACY_DIR);
    }
  )
);
function buildComponents(defines, dir) {