This… While I don’t like how the source code isn’t updated to the public regularly there isn’t anything fishy in Kiwi, we get regular updates and there are some neat features like being able to change the tab switcher UI or use desktop extensions.
Opera was acquired by a chinese consortium back in 2016 or so. IMO opera telemetry isn’t too different from other proprietary browsers like chrome or edge but there were also some controversial decisions on Opera such as not removing a chinese CA cert (wosign?) that was being widely misused etc.
Though I feel Firefox (and its fork Fennec FDroid) is a lot slower than other browsers based on Chromium like Bromite and Kiwi. I’m using a phone that’s pretty low-end in 2023 standard though. (MSM8974 with 2GB ram running Android 11)