Comparison of HTML5 and Flash Google Chrome, by dropping support for NPAPI and using only Chrome's PPAPI. In August 2016, Adobe announced that, beginning with version 24, it would resume offering of Flash Player for Linux for other browsers. All web browsers support HTML and other Web standards to various degree. Adobe released a tool that converts Flash to HTML5, and in June 2011, Google released an experimental tool that does the same. , versions of browsers such as Chrome, Firefox, Internet Explorer, Opera, and Safari implement HTML5 to a considerable degree. However, some portions of the HTML5 specification were still being implemented by browser
Quirks mode Web Consortium, which maintains the XHTML specification, suggests that authors of XHTML documents could consider omitting the XML declaration. Henri Sivonen compiled a list of various document types and how they are treated in the most common browsers, showing whether pages are rendered in Quirks, Standards, or Almost standards mode. The criterion used for "Almost standards mode" is non-standard table cell height rendering. This table applies to content served with the Content-Type text/html. Content served with the Content-Type application/xhtml+xml is rendered in Standards mode in Chrome, Firefox, Internet Explorer 9, Safari, and Opera. Internet Explorer 6, 7, and 8 do