...id=com.ulm.html5editor
Chrome app: HTML, XHTML and XML editor - https://goo.gl/bYR7fF
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== Update 30.06.2017 ==
Windows 7 and later, macOS and later are supported
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Instructions for installing macOS app
Download and open zip archive, HTML5-Editor-darwin-x64.zip, in your macOS. Then extract file and move HTML5-Editor.app in your Applications folder of your Mac. Finally open application with double click to start to work
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