I can't find the parent to my comment.. but I'm fairly certain this thread was talking about default-installs of browsers, of course a lot of complaints can be fixed with plugins, but how many users actually go through the trouble? If a high enough percentage of Chrome users were installing uBlockOrigin on Chrome, I'm sure Google would do something about it.

Regarding Tree-Style Tabs... I wish I could agree with you, I have been trying various Tree-Style Tab plugins on multiple occasions over the years, often for months at a time... before always giving up out of frustration and resorting back to tabs on top. I honestly can't tell you the exact reasons, but it's generally a frustrating experience... initial transition takes a couple days, plus issues like lack of proper hotkey support e.g. tab/ctrl-tab for tab switching, ctrl-f4 to close a tab, ctrl-t to open a new tab, some or all of those hotkeys tend to not work properly. Multi-screen support was also... lacking, for lack of a better description. There were various other minor annoyances and quirks with every plugin... and I tried various plugins for FF and Chrome before ditching all of them. I will probably try again soon, now that FF Quantum has been out for awhile, hopefully more plugins have been created.