On this article, I found some bullets is not align with bulleted text when I enabled WebKit compatibility on Firefox for mobile.
Topic on Extension talk:MobileFrontend
To make Firefox for mobile compatible with WebKit, first, you need to open about:config page, second, find an option called layout.css.prefixes.webkit, finally turn the value to true.
Thanks for reporting, the bug has been captured in https://phabricator.wikimedia.org/T153199. Please subscribe there if you're interested in it's development.