Mac Mini web browsing capabilities by CPU type

Early Mac Minis were all PowerPC G4 processors.  This meant, they will always have trouble loading the latest websites, as there is no Silverlight for PowerPC, and you probably need to look at these solutions for Adobe Flash:

Go to Apple menu -> About This Mac to find out if you have a G4 or an intel processor.   Java on 10.5.8 is very limited

If you have an Intel, you at least can upgrade to 10.6.8, which is still limited in terms of Java, but a little better:

If you have at least an Intel Core2Duo or Core i3, i5, or i7, you can upgrade to Mac OS X 10.7.3 or later, but only after checking your software compatibility with this tip:

10.7.3 offers both the latest Java and Flash support to date, and thus will not have trouble browsing any website except the few that require Windows, which can be added through this tip:

Additional web browsers can be found on my tip recently updated, and on my own website.