Safari (web browser) none. While no official word has been released by Apple, the indication is that these are the final versions available for these operating systems, and both retain significant security issues. While Safari pioneered several now standard HTML5 features (such as the Canvas API) in its early years, it has increasingly come under attack for failing to keep pace with modern web standards. In the past, Apple did not allow third party web browsers under iOS, but now there are plenty of web browsers available for iOS, including Chrome, Firefox, Opera and Edge. However, due to Apple developer's policies, browsers like
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