There is no trade-off of functionality for security: the Web site can use the full range of active content tools, and if it uses these tools maliciously to install software or otherwise make changes in your computer, then these changes can be easily undone.

Sandboxie has originally been designed to increase the security of browsing with Internet Explorer, however it is just as effective with any other browser, and in fact, any other program. Sandboxie wraps a protection layer around the programs it supervises. It is this layer that intercepts and isolates any changes the programs make to the computer. And this layer is impartial to the specific program it wraps. Read more.