# Configuration:
- Web browser and its version: Chrome
- Operating system and its version: MacOS
- PDF.js version: 2.6.347
- Is a browser extension: No

# Steps to reproduce the problem:
1. Implement FindBar, including Find next / Find prev buttons

# What is the expected behavior? (add screenshot)

This might be intentional but seems a bit off. The PDFFindBar findPreviousButton / findNextButton should raise an event with options that can be passed directly to PDFindController.executeCommand

What went wrong? (add screenshot)

PDFBar raises an event on the EventBus which looks like this;

`this.eventBus.dispatch("find", { query: "hello",  ... type: "again" .... });`

https://github.com/mozilla/pdf.js/blob/00b4f86db301546d21d5dc79c61e2a9a829667a4/web/pdf_find_bar.js#L93-L105
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PDFFindController expects;

`pdfFindController.executeCommand("findagain", { query: "hello" });`

Which means you can't just pass the options through because the cmd doesn't match. Is there a reason PDFFindController doesn't just accept the following?

`pdfFindController.executeCommand("find", { query: "hello", type: "again" });`

Seems like it should work this way?

Thanks

pageRatio = pageWidth / pageHeight;
    this.canvasWidth = THUMBNAIL_WIDTH;
    this.canvasHeight = (this.canvasWidth / pageRatio) | 0;
    this.scale = this.canvasWidth / pageWidth;
    this.l10n = l10n;
    const anchor = document.createElement("a");
    anchor.href = linkService.getAnchorUrl("#page=" + id);
    this._thumbPageTitle.then(msg => {
      anchor.title = msg;
    });
    anchor.onclick = function () {
      linkService.goToPage(id);
      return false;
    };
    this.anchor = anchor;
    const div = document.createElement("div");
    div.className = "thumbnail";
    div.setAttribute("data-page-number", this.id);
    this.div = div;
    const ring = document.createElement("div");
    ring.className = "thumbnailSelectionRing";
    const borderAdjustment = 2 * THUMBNAIL_CANVAS_BORDER_WIDTH;
    ring.style.width = this.canvasWidth + borderAdjustment + "px";
    ring.style.height = this.canvasHeight + borderAdjustment + "px";
    this.ring = ring;
    div.appendChild(ring);
    anchor.appendChild(div);
    container.appendChild(anchor);
  }
  setPdfPage(pdfPage) {