How secure are passwords stored by Firefox and Chrome?

I installed Passware 12.3, a password recovery program and after testing it out found something interesting. I tried the website password recovery option and was instantly shown a list of every password I had saved using Firefox and the website it belonged to. No results showed up for Chrome however. As far as Internet Explorer goes well I haven't used it in about 10 years. Looks like Firefox will be uninstalled and never used again.