I have enabled quirks mode but I am not satisfied with the quality. Now I use https://validator.w3.org/#validate_by_input as the most reliable way to check my markup. I open the browser Copy-Paste, it's exhausting practice, how can I automate it? It would be really helpful to have a shortcut, menu item and key combination to launch default browser with opened w3c with the HTMl file I'm currently editing.
PS: Intellij IDEA 2017 Ultimate on top of MS Windows 10