Complete These Steps to Use the Extension More Conveniently:

1. Pin the extension for quick access to the HTML Validator

2. To launch the extension, open Developer Tools.

Press ⌥+⌘+I (Mac) or Ctr+Alt+I (Windows), or see the instructions in the screenshot below

3. Click on the arrows and Select the "HTML Validator" tab

4. The HTML Validator is ready to use