I use Firefox on Ubuntu and Android. I love Firefox more than Chromium-based browsers. But security is the one thing that makes me think of switching.
Two minor things that prevent me from switching to Chromium-based browsers:
1. There is no addon functionality on Android for Chromium-based browsers. For example, I can add the uBlock addon on Firefox for Android but not Chrome for Android.
2. There is no option to place the address bar at the bottom of the screen for one-handed usage, as in Firefox Android.
Two minor things that prevent me from switching to Chromium-based browsers:
1. There is no addon functionality on Android for Chromium-based browsers. For example, I can add the uBlock addon on Firefox for Android but not Chrome for Android.
2. There is no option to place the address bar at the bottom of the screen for one-handed usage, as in Firefox Android.