Access to embedded webextension from legacy XUL add-on

[NilkasG (Niklas Gollenstede)]

WebExtensions porting: embeddeding webextension in XUL addon

Hello, I’m trying to rewrite my mSK to webextension. First step would be embedding webextension in my current add-on, so I can import user preferences. I know that I need to run webExtension.startup(), but is there a way to do it in XUL, non-boostrapped extension? Does the only option is to rewrite my add-on as bootstrapped and then embed webextension? Regards, Pwl