There are many online tools, web browser extensions, and add-ons to help you evaluate and test web pages. We will be talking about web page validation later, but you can use these tools now to become familiar with such tools and how to integrate them into your web browser.

Most browser-integration tools are browser specific, compared to online tools which sit in web pages, accessible through any browser. Browser-integration tools include extensions, add-ons, and bookmarklets.

How to Add an Extension or Add-on to Your Web Browser

To add an extension or add-on tool to your browser:

• Go to the page or site for your browser’s extensions or add-ons:
  • Add-ons for Firefox
  • Chrome Web Store – Extensions
  • Internet Explorer Browser Extensions
  • Safari Extensions Gallery
  • Extensions – Opera add-ons
• Follow the instructions.

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