Maintain the ignore file

You can ignore specific elements like so: matcher: type=meta

To ignore whole subtrees, use e.g. XPath: matcher: xpath=HTML[1]/BODY[1]/DIV[1]

To ignore attributes globally, use: attribute=class

To ignore attributes e.g. of specific elements: matcher: type=img, attribute: alt

You can use regex for elements or attributes: attribute-regex=data-.*

More details and examples can be found in the documentation.