Ella

Sure let's skip Firefox for these two

Closing and reopening since I didn't make this PR from my fork.

> how easy would that be? Could we "just boot" the Gutenberg framework or fork the standalone Blocknotes editor? I'm not sure I'm following. You're talking about a Playground Extension...

Yes, honestly that makes more sense for something simple like editing with the block editor in the browser

Yes, this is expected. What script are you loading in the iframe that can only be executed once?

It is executed once per page: the iframe is a completely different document, a bit like a preview tab. That said, you are correct that `enqueue_block_assets` shouldn't be loaded in...

So for these reasons I am curious _why_ it's a problem. What is your script doing?

Unfortunately that library seems to be closed source, so I cannot test. Is the problem merely loading the library script, or are you doing some initialisation (your script) twice inside...

@wpsoul I created https://github.com/WordPress/gutenberg/pull/54250. Does that work for you?

There's a PR open that isn't merged yet, I will need to have another look at what the blockers where, and it needs testing.