STR:
  - Go to https://mozilla.github.io/pdf.js/web/viewer.html
  - Click on "Open File" and open a pdf

The `Download` button and the `Current view` one just disappear.
I can reproduce this bug with Firefox nightly, Chrome stable and Epiphany on debian.
LinkTarget,
  loadScript,
  MissingPDFException,
  OPS,
  PDFWorker,
  PermissionFlag,
  shadow,
  UnexpectedResponseException,
  UNSUPPORTED_FEATURES,
  version,
} from "pdfjs-lib";
import { CursorTool, PDFCursorTools } from "./pdf_cursor_tools.js";
import { PDFRenderingQueue, RenderingStates } from "./pdf_rendering_queue.js";
import { OverlayManager } from "./overlay_manager.js";
import { PasswordPrompt } from "./password_prompt.js";
import { PDFAttachmentViewer } from "./pdf_attachment_viewer.js";
import { PDFDocumentProperties } from "./pdf_document_properties.js";
import { PDFFindBar } from "./pdf_find_bar.js";
import { PDFFindController } from "./pdf_find_controller.js";
import { PDFHistory } from "./pdf_history.js";
import { PDFLayerViewer } from "./pdf_layer_viewer.js";
import { PDFLinkService } from "./pdf_link_service.js";
import { PDFOutlineViewer } from "./pdf_outline_viewer.js";
import { PDFPresentationMode } from "./pdf_presentation_mode.js";
import { PDFScriptingManager } from "./pdf_scripting_manager.js";
import { PDFSidebar } from "./pdf_sidebar.js";
import { PDFSidebarResizer } from "./pdf_sidebar_resizer.js";
import { PDFThumbnailViewer } from "./pdf_thumbnail_viewer.js";
import { PDFViewer } from "./pdf_viewer.js";
import { SecondaryToolbar } from "./secondary_toolbar.js";