Firefox/SeaMonkey extension
The Browser extension provides one-click validation of your web pages (or your entire website with the Pro tool). Once installed all you do is browse to the page you want to validate then click on the 'TV' icon in the toolbar and it will call the Basic or Pro tool to validate it.
Most of the options on the Basic and Pro tools are available using a series of tabbed pages on the options dialog:

Note: The browser extension is fully integrated with both the Basic and Pro tools and you must have one of these installed to use it.

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