Webextension?

[davidascher]

Thank you for this effort!

This would be a lovely capability to let users add to others' web pages using a webextension browser addon.

[Jogai]

Created a bookmarklet for you:

javascript:(function()%7Bvar%20sheets%20%3D%20document.querySelectorAll('link%5Brel%3Dstylesheet%5D')%3Bfor(var%20i%3D0%3Bi%3Csheets.length%3Bi%2B%2B)%7Bsheets%5Bi%5D.parentNode.removeChild(sheets%5Bi%5D)%3B%7Dvar%20styles%3D%20document.querySelectorAll('style')%3Bfor(var%20i%3D0%3Bi%3Cstyles.length%3Bi%2B%2B)%7Bstyles%5Bi%5D.parentNode.removeChild(styles%5Bi%5D)%3B%7Ddocument.querySelector('head').innerHTML%20%2B%3D%20'%3Clink%20rel%3D%22stylesheet%22%20href%3D%22https%3A%2F%2Funpkg.com%2Fgutenberg-css%400.4%22%20type%3D%22text%2Fcss%22%2F%3E'%7D)()

How to add (replace their example with the above code): https://gist.github.com/caseywatts/c0cec1f89ccdb8b469b1#try-one-out