I have one minor complaint based on that screenshot: "Installed size 44,6 MB" does not have the same meaning as "After this operation, 44,6 MB of additional disk space will be used."
It's okay to have it use fewer words, but it should not be at the expense of accuracy.
What the Firefox User Research team is doing: Translating team-focused product development insights into human-centered global public expert strategic knowledge to reduce risk.
What I would rather see it do: Whatever is necessary to get the url bar selection behaviour on linux fixed.