Comment by lucb1e
the 'based' does the heavy lifting there. I said Firefox (the browser) not Gecko (the engine). I'm sure you can customize everything in either browser (or engine) if you download the source and recompile it with the modifications you like, or even hex edit the binary, go wild. But I'm sure you know what is meant...
> But I'm sure you know what is meant...
Not really, you've explicitly said this
> Yet it's still more customizable for users than Chrome/ium is
And then rejected the fitting comparison: Firefox (the browser) is not more customizable than Chromium-Vivaldi (the browser)
I also don't see how the engine used for page rendering is relevant when discussing UI