Firefox received an update in mobile. Latest feature I enjoy is I can use private browsing by default. Trouble is that you have to find the option to add the icon to the desktop first.
Now for the annoyances
1 Forgotten settings. Thankfully, the bookmarks are still intact and addons sort of are (had to re-enable for private browsing). But a lot of things need re-configuration including making it the default browser.
2 Different UI. Most apparent is that the search menu bar is at the bottom. Going through all of the notices and settings is required.
3 Both Firefoxes
appear to load pages differently. The pages populate visually only after everything loads, so I get a blank page for a while. On busy or load heavy ones, this can be annoying.