Because of crippling defects in Safari (pages just not loading, hyperlinks not being recognized as such, clicks doing nothing), I decided to go back to Firefox. This was made feasible by the availability of a bookmark-syncing facility across devices.
But... wow it's painful. On mobile, the bookmarks are buried under layers of inexplicable and unneeded menus. It's infuriating to use.
On the desktop, the storage of log-in credentials is only half done. It'll remember what user ID you might have used for a site, but it then fails to select the password associated with that ID. It just presents a giant list of every password for every ID you might have used on the site. You have to scroll through them all, and sometimes there are duplicates. Why?
Then there's the inability to specify that new tabs should open on your home page. Instead, new tabs have to open on the Mozilla home page, which presents a search bar that's useless. When you start typing in it, a giant search panel erupts from the top of the screen and the cursor jumps into it. WTF? Who thought that was good design?
I will probably just go back to Safari, because I refuse to support Google's shit. But what's going on with Firefox? They're putting dev time into the garbage reported in this article, and ignoring glaring defects that are driving Firefox's already tiny market share away.