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No, these cannot be skipped without external request blocking, like on DNS level. Even µblock won't block GA built-in in Firefox.

uMatrix defaults to blocking GA and indeed blocks the request for analytics.js on that page.

Really? I thought no extensions are permitted to run on that page.

i now realise you/parent were talking about the about:addons page, not the https://addons.mozilla.org/en-US/firefox/ web page.