It appears that the official chrome webstore extension by Rob W is outdated.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

.pipe(
            postcss([
              postcssLogical({ preserve: true }),
              postcssDirPseudoClass(),
              autoprefixer({ overrideBrowserslist: ["Chrome >= 85"] }),
            ])
          )
          .pipe(gulp.dest(CHROME_BUILD_CONTENT_DIR + "web")),
        gulp.src("LICENSE").pipe(gulp.dest(CHROME_BUILD_DIR)),
        gulp
          .src("extensions/chromium/manifest.json")
          .pipe(replace(/\bPDFJSSCRIPT_VERSION\b/g, version))
          .pipe(gulp.dest(CHROME_BUILD_DIR)),
        gulp
          .src(
            [
              "extensions/chromium/**/*.{html,js,css,png}",
              "extensions/chromium/preferences_schema.json",
            ],
            { base: "extensions/chromium/" }
          )
          .pipe(gulp.dest(CHROME_BUILD_DIR)),
      ]);
    }
  )
);
gulp.task("jsdoc", function (done) {
  console.log();
  console.log("### Generating documentation (JSDoc)");
  const JSDOC_FILES = ["src/display/api.js"];