You got me scratching my head there ngl. If by inline expansion, you mean to say being able to show image in full size without clicking into details of the post, then I am seeing it’s already there. And so far I haven’t tweaked any UI settings on the website.
For an example, Mozilla being forced to use Google Location Services as default even though Mozilla has its own. I am also a Firefox user but it always makes me wonder what other TnCs forced on Mozilla as part of the search deal.