mozilla is the best browser as far as i'm concerned. currently i'm using mozilla firefox .8
regardless of what browser you use, you need a flash player plugin. you can download it from here, and they give you install instructions (very simple installation):
i am not sure what the other plugin you asked for is.
if you wanna try a different browser, there are plenty of them. i like opera (www.opera.com
), but it's a bit bloated. in kde the default is konqueror, in gnome, i believe, galeon or something (never used gnome). still, i suggest sticking with mozilla or getting firefox.