Brave is OPENSOURCE ๐คฆโโ๏ธ And Ecosia does care more about the enviroment then your privacy. I prefer DDG or StartPage, or if you really wanna get sure, use somthing like SearXNG or LibreX.
Voxel
You can use forks of Signal which removed the proprietary part. For example there is Molly (Hardened Signal) which has two version and one of them is fully foss.
There is enough evidwnce that this is wrong. I would recommend to watch Techlores Interview too.
I would like to see evidence for your claim that Firefox is more private.
That hasn't do anything with the results. You can test everything yourself. Techlore also made a interview with him.
Please provide any evidence for your false claim.
Brave is more secure, in terms of safety, because it's base on chromium and has unique Privacy Features. If you won't use Brave, LibreWolf or hardened Firefox is ur best choice.
LibreWolf nd Brave are on the same Level if both are hardened.
Only in some cases. This extension for example isn't fingerprintable. You would need to control the site from where u open Reddit for example by clicking a link + control reddit to test if connect to this site. And even this is not a goo methode + common fingerprinting protections will prevent this.
The CEO was before CEO of Mozilla lmao, but stepped back, because the entire Internet hated Firefox, because of his political opinion.