Access to embedded webextension from legacy XUL add-on

[fnxweb (Neil Bird)]

I have a legacy XUL extension for which I’d like to produce an interim
hybrid version that migrates its prefs. ahead of a full webextension
version.

However, it’s an old-format XUL add-on, so no bootstrap and not using
the SDK API. The examples for creating & accessing an embedded
webextension only cover those two cases (either passing it into the
bootstrap start function or via the SDK’s “require” function).

How can I access the webExtensions object from basic XUL add-on code?

[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