I'm using Firefox Preview regularly for a few month now, and it really is a huge step up in performance. Javascript and CSS-heavy sites now behave as they should, and browsing feels smooth overall. However the UI changes are a big step back and the main reason why I've not completely switched over from the regular Firefox (now I won't have that choice it looks like) :
- The address/search bar is much much inferior. Much less relevant results now come up first. When typing the domain name of a site I visit daily said site will come up low on the list, needing to scroll, while some autocompleted address I've never visited once will be on top.
- Extensions are not supported. A single supported extension does not count.
- The thumbnails are removed from the tab list. Not a huge loss but I had gotten used to it
- Popups each time you close a tab use up unnecessary screen space. Also they often just stay there.
- The address bar is now at the bottom. Change for the sake of change.
I don't know if all of these issues will transfer to the new Firefox, but I wish they would have brought in the engine changes only. Current UI is fine.
- The address/search bar is much much inferior. Much less relevant results now come up first. When typing the domain name of a site I visit daily said site will come up low on the list, needing to scroll, while some autocompleted address I've never visited once will be on top.
- Extensions are not supported. A single supported extension does not count.
- The thumbnails are removed from the tab list. Not a huge loss but I had gotten used to it
- Popups each time you close a tab use up unnecessary screen space. Also they often just stay there.
- The address bar is now at the bottom. Change for the sake of change.
I don't know if all of these issues will transfer to the new Firefox, but I wish they would have brought in the engine changes only. Current UI is fine.