I segregate different parts of my online activity into different browsers (work, personal, side projects, etc) and use Chrome, Firefox, and Brave all daily. With the exception of learning some of the UI differences, and the built-in privacy features of Brave, I use all the browsers interchangeably and without any issues (I manually add uBlock Origin to Chrome and FF).
Without focusing too much on the personal subjective elements, what are the definitive features that makes Chrome a better browser?
The biggest issue I have with Firefox compared to Chrome is that even though DevTools is constantly getting updated, I still can't trust it. At all.
Try to use breakpoints for a bit and it quickly gets so tangled you have to close everything and start over to untangle it. Tangled how? Disabling a breakpoint and refreshing restores the breakpoint. Often there are ghost breakpoints remaining that you can't disable at all. I don't think I've ever gotten DOM breakpoints to work in FF, never had issues in Chrome. I can't even dream about using logpoints or similar.
Just today I was helping a coworker debug an issue using DevTools. We enabled break on exception and refreshed. Nothing happens. The console still shows the exception on every refresh. We click around and realize the Sources tab doesn't load anything. Again closing everything and reopening fixes the issue, but I hate to always have to suspect the DevTools first when debugging.
Another thing, which obviously isn't Firefox's fault, is that websites are optimized and built for Chrome, so you often get a degraded experience, if they work at all.
Regardless, I don't see myself ever going back to Chrome.
Chromium ships with the Raspberry Pi but its an optimized version so not a clean comparison.
Mind that Mozilla Foundation main source of income is Google, Mozilla is not much interested in spending that money on Firefox development and Firefox loose his great competitive advantage of powerful addons making everything possible, since allowing WebExtensions only (same as Google uses) at version 57.