Merge pull request #24 from SharinPix/dark-mode

Always use dark mode

Author: atishdhu

web/app_options.js

@@ -468,7 +468,8 @@ if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("MOZCENTRAL")) {
   };
   defaultOptions.viewerCssTheme = {
     /** @type {number} */
-    value: typeof PDFJSDev !== "undefined" && PDFJSDev.test("CHROME") ? 2 : 0,
+    // value: typeof PDFJSDev !== "undefined" && PDFJSDev.test("CHROME") ? 2 : 0
+    value: 2,
     kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
   };
   defaultOptions.enableFakeMLManager = {