Is it possible to have two browsers, one with Silverlight 3, one with Silverlight 4?

For development reasons, I can't install Silverlight 4 on a particular machine.

Is it pos开发者_JS百科sible to install the Silverlight 4 plugin on one browser, e.g. in Chrome or Opera, while Firefox and Explorer continue to use the Silverlight 3 plugin?

Nope. Just tried it. The Silverlight installer installs the plugin for all installed browsers. Can you run a virtual machine and install SL4 on that?

Silly question, why not just install the Silverlight 4 runtime and continue to develop with the Silverlight 3 Development tools?

The Silverlight 4 runtime is (theoretically) 100% backwards compatible and can run any Silverlight 3 XAP.