Errors:
Legacy doctype. Expected “<!DOCTYPE html>”.
Attribute “xmlns:fb” not allowed here.
Attribute “xmlns:og” not allowed here.
Attribute “xmlns:article” not allowed here.
Attribute “xmlns:book” not allowed here.
Attribute “xmlns:profile” not allowed here.
Attribute “xmlns:video” not allowed here.
Attribute “xmlns:product” not allowed here.
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
The “version” attribute on the “html” element is obsolete. You can safely omit it.
The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.
Bad value “__blank” for attribute “target” on element “a”: Reserved keyword “_blank” used.
The “center” element is obsolete. Use CSS instead.
Bad value “https://twitter.com/share?text=When you shop @AmazonSmile, Amazon will make a donation to the Amateur+Radio+Safety+Foundation (Winlink)&url=https://smile.amazon.com/ch/20-5586920” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Warnings:
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
Attribute with the local name “xmlns:og” is not serializable as XML 1.0.
Attribute with the local name “xmlns:article” is not serializable as XML 1.0.
Attribute with the local name “xmlns:book” is not serializable as XML 1.0.
Attribute with the local name “xmlns:profile” is not serializable as XML 1.0.
Attribute with the local name “xmlns:video” is not serializable as XML 1.0.
Attribute with the local name “xmlns:product” is not serializable as XML 1.0.
The “type” attribute is unnecessary for JavaScript resources.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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