Plus, there are already new IDEs showing up, for example https://chrome.google.com/webstore/detail/kantu-browser-auto...

Same here... Firefox remains my default browser for its indepence. And it is great to see it improve. Once they catch up with the Webapi I hope they keep expanding it beyond a Chrome copy.

This extension uses the Webapi... so I assume it can be "backported" to Firefox?