GoKawiilWeb history: relic HTML tags like X-UA-Compatible still linger in old code
A retrospective catalogs obsolete HTML snippets that were never part of the official specification but emerged from browser wars, vendor extensions, and third-party integrations. Examples include the X-UA-Compatible meta tag used to force Internet Explorer into specific rendering modes, and the chrome=1 directive tied to Google's now-defunct Chrome Frame plugin that let IE 6-9 users render pages using Chrome's engine.