The browser should pick them up automatically but sometimes it takes a while particularly if you have a large list of favourites.

It's worth mentioning that favicons are an important part of optimisation. Google will give you another little score if you have a favicon. How big that little score is we can only guess and you can be sure it won't be that high in importance but 'every little helps' as they say in food retail.

yes, please browse at google, free favicon, you'll get many links