Over the years there have been necessary changes to the web platform that caused legacy websites to break.
Below is a list of those changes.
- SSL removed in favor of TLS wiki
- Adobe Flash (SWF) End of Life wiki
<applet>
and<marquee>
and many other tags removed html5window.showModalDialog
removed operablog- Passive touch listeners by default googleblog
- Forms with passwords marked
Not Secure
over HTTP googleblog renamed toArray.prototype.flatten
breaks MooTools bugzillaArray.prototype.flat
- HTML Imports (part of Web Components) deprecated googleblog
- Cookies changed from
SameSite=None
toSameSite=Lax
by default chromestatus tweet alert()
andconfirm()
removed from cross-origin iframes chromestatus tweet