Configuration:
- Web browser and its version: Firefox 94
- Operating system and its version: Linux
- PDF.js version: browser built-in

Steps to reproduce the problem:
1. Open any PDF in Firefox via pdf.js (either built-in or standalone)
2. Observe that as long as the tab with the PDF is open, the browser has increased CPU usage (visible in `top`) and is waking up rapidly (visible in `powertop`), probably updating the page for each vsync (GPU interrupts go up). Unfortunately, profiling via developer tools does not show anything.

What is the expected behavior? The tab with the PDF should not cause the browser to wake up when I do not interact with it.

What went wrong? The tab with the PDF is somehow causing periodic activity in the browser many times per second, causing unnecessary CPU usage and energy waste.
const text = await this.pdfPage.getTextContent();
    const items = [];
    for (const item of text.items) {
      items.push(item.str);
    }
    this.textHighlighter.setTextMapping(textDivs, items);
    this.textHighlighter.enable();
  }
  /**
   * @private
   */
  _resetZoomLayer(removeFromDOM = false) {
    if (!this.zoomLayer) {
      return;
    }
    const zoomLayerCanvas = this.zoomLayer.firstChild;
    this.paintedViewportMap.delete(zoomLayerCanvas);
    
    
    zoomLayerCanvas.width = 0;
    zoomLayerCanvas.height = 0;
    if (removeFromDOM) {
      
      this.zoomLayer.remove();
    }
    this.zoomLayer = null;
  }
  reset({