QR Code Generator

Extension Purpose

The QR Code Generator extension is designed to create a QR code for the current website URL. It allows users to customize the QR code by changing its size, background color, and fill color.

Code Functionality

• Canvas Management: The extension creates or retrieves a canvas element to render the QR code.

  let canvas = document.getElementById("qr-code");
  if (!canvas) {
      canvas = document.createElement("canvas");
      canvas.id = "qr-code";
      const container = document.getElementById("qr-container");
      while (container.firstChild) {
          container.removeChild(container.firstChild);
      }
      container.appendChild(canvas);
  }
  

• QR Code Generation: Utilizes the QRious library to generate a QR code with customizable properties such as size, background color, and fill color.

  const qr = new QRious({
      element: canvas,
      value: url || "https://google.com",
      size: parseInt(size),
      background: bgColor,
      foreground: fillColor,
      level: 'H', // High error correction
  });
  

• Color Validation: Ensures that the color inputs are valid hexadecimal values.

  function isValidHex(color) {
      return /^#[0-9A-F]{6}$/i.test(color);
  }
  

• URL Retrieval: Fetches the current active tab's URL using the Chrome API.

  async function getCurrentTabUrl() {
      try {
          const tabs = await chrome.tabs.query({ active: true, currentWindow: true });
          return tabs[0].url;
      } catch (error) {
          console.error("Error getting tab URL:", error);
          return "https://google.com";
      }
  }
  

• Event Handling: Listens for changes in the input fields to update the QR code dynamically.

  bgColorInput.addEventListener("change", () => {
      if (isValidHex(bgColorInput.value)) {
          generateQRCode(urlInput.value, bgColorInput.value, fillColorInput.value, sizeInput.value);
      }
  });
  

Network and API Activity

• Chrome API: Utilizes chrome.tabs.query to access the current tab's URL.
• No External Network Requests: The code does not make any network requests beyond fetching the current tab's URL.

Security and Malicious Activity

• No Obfuscation or Backdoors: The code is straightforward and lacks any obfuscation techniques or hidden backdoors.
• No Data Exfiltration: There is no evidence of data being sent to external servers or unauthorized data access.
• Code Execution: The extension does not execute any external scripts or commands.

Conclusion

The QR Code Generator extension appears to be a benign utility for generating QR codes based on the current tab's URL. It provides customization options for the QR code's appearance and does not exhibit any malicious behavior.