One off page issues on safari

Describe the bug

A few bugs running makecode tools on safari:

makecode.com/multi:

[Error] SecurityError: IDBFactory.open() called in an invalid security context
	e (main.js:1:967098)
	(anonymous function) (main.js:1:967155)
[Error] TypeError: undefined is not an object (evaluating 'H.reloadEditor')
	(anonymous function) (main.js:1:97845)
	(anonymous function) (main.js:1:105550)

first happens each reload, second happened only first time after bump. Stuck spinning for me, works on all but microbit.

makecode.com/tutorial-tool:

[Error] Failed to load resource: the server responded with a status of 404 () (dapjs.js.map, line 0)
https://pxt.azureedge.net/commit/23c3d8c7f8a0f44f7681d1e3de648cb6b67220d2/dapjs.js.map

looks like this:

makecode.com/playground:

streamer:

[Error] Error while parsing the 'sandbox' attribute: 'allow-downloads' is an invalid sandbox flag. (streamer, line 1073)
[Error] Error while parsing the 'sandbox' attribute: 'allow-downloads' is an invalid sandbox flag. (streamer, line 1074)
[Error] Failed to load resource: the server responded with a status of 404 (Not Found) (undefined, line 0) //// NOTE; this one's trying to access https://makecode.com/undefined, which seems odd?
[Error] SecurityError: IDBFactory.open() called in an invalid security context
	e (main.js:1:967098)
	(anonymous function) (main.js:1:967155)
[Error] NotSupportedError: The operation is not supported.
(anonymous function) — script.js:1475
forEach
(anonymous function) — script.js:1472
asyncFunctionResume
[native code]
promiseReactionJob

	(anonymous function) (script.js:80)
	asyncFunctionResume
	(anonymous function)
	promiseReactionJob

@shakao the tutorial tool / playground tool issues just seem like css bugs, so probably hard to debug without a mac / I can fix it real quick if that sounds easier? at a glance it looks like .editor-row { height: 100% } is all that's needed for both tutorial tool and playground but have to check (and not sure about the failed dapjs.map fetch)

Reproduce the Safari failures on makecode.com/multi, /tutorial-tool, /playground, and streamer. Start with the reported main.js and script.js locations, the missing dapjs.js.map request, and the .editor-row CSS suggestion; done means these pages load without the reported Safari errors, layout issues, or stuck spinner.