Ouch, you really should put a warning about that one for those with lower end machines
Page shows as 605 KB in size, even so, takes an absurdly long time to finish loading on my end.
(ftp client, using ftp:// is worlds different, better.
Loading using ftp:// in the browser was much better then html:// in the browser, but still slow, nowhere near as quick as ftp client. And that directory only has files back through 2013, 36,999 entries
Closing the tab
Closing the browser
, having it release itself from memory, was quite time consuming (to say the least [& was only using ~500 MB RAM, having both http: & ftp: pages open in the browser]).
(Will be very interesting to see how current FF does on that page.)
Oh, & if you're going to compare, use separate Profiles.
And even between loads of the same Profile, be sure & clear your /cache/.