You’ve basically described vscode!

As far as I understand, VSCode browser can't install browser extensions and doesn't even have Dev Tools. For example, IntelliJ IDEs ship with CEF-based browser that has Chromium Dev Tools, but it still doesn't support browser extensions.

I was being a little tongue in cheek, and my "basically" was doing a lot of heavy lifting. VSCode is electron based, so under the hood it's already doing the heavy lifting. It's got a first class editor, first class terminal, first class plugins developed using web tech, very easily and readily debuggable.

It has a browser built in, which is "just" an iframe, and it definitely doesn't function as a full blown web browser, but it does work for previewing your dev work, and given it's a dev tool it makes sense that the experience would be editor+debugger+tools first, with browser as a second class citizen (rather than chrome with an embedded terminal which would be the other way around).

Instead you can use https://github.com/coder/code-server, which is really vscode running in your browser. You then get all extensions, etc.

I built a project to add a terminal emulator to the browser (using a chrome extension): https://github.com/pomdtr/tweety.

I'm working on a `tweety edit` command which open arbitrary files in your $EDITOR of choice in a new tab.

Looks great, I'll give it a try!