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These extensions and wallpapers are made for the Opera browser.

Download Opera browser with:

  • built-in ad blocker
  • battery saver
  • free VPN

These extensions and wallpapers are made for the Opera browser.

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(X)HTML5 Checker 아이콘

(X)HTML5 Checker

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개인 정보 보호 정책

The add-on uses the HTML validation service APIs available on this page - https://validator.w3.org/nu/. If you wish to receive more information on the validation of the html code offered by W3C you can find all the information on this page - https://validator.w3.org/nu/about.html

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