Warnings:
Documents should not use “about:legacy-compat”, except if generated by legacy systems that can't output the standard “<!DOCTYPE html>” doctype.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “adfox_1479395279” was here.
The first occurrence of ID “social-widget__tab-facebook” was here.
The first occurrence of ID “social-widget__tab-vkontakte” was here.
The first occurrence of ID “social-widget__tab-twitter” was here.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “width” not allowed on element “a” at this point.
Attribute “height” not allowed on element “a” at this point.
Attribute “region” not allowed on element “option” at this point.
Duplicate ID “adfox_1479395279”.
Element “script” must not have attribute “charset” unless attribute “src” is also specified.
Duplicate ID “social-widget__tab-facebook”.
Duplicate ID “social-widget__tab-vkontakte”.
Duplicate ID “social-widget__tab-twitter”.
Bad value “self” for attribute “rel” on element “a”: The string “self” is not a registered keyword.
The “language” attribute on the “script” element is obsolete. Use the “type” attribute instead.
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