Things to like about Google Chrome:
- aesthetically pleasing built-in pdf viewer with printing options that I find important
- built-in support for greasemonkey scripts
- the developer tools!
Not sure but I think Safari supports these too.
Things to like about Mozilla Firefox:
- all of those Chrome features? there’s (probably) an add-on for it. in fact two of the Chrome features were definitely inspired by firefox add-ons. but there issues with relying on add-ons.