If you're looking to access webpages through an SSH proxy, you may find that the –L option is a bit too limiting, since you need to specify each individual web server that you're forwarding and give each one its own local port.
If your remote network contains an HTTP proxy like Squid or Apache's mod_proxy, then you may choose to forward the port of that proxy server. If you don't have one available, then consider using OpenSSH's built in SOCKS proxy functionality.
Enabling the socks proxy is trivial. Just specify –D 8000 where 8000 is the local port that you want to configure the clients to use. Then just configure your client to use that port as a SOCKS proxy. For some clients, you'll need to explicitly tell them to use remote DNS if you're connecting to resources which are not remotely resolvable.
The following screenshot will show you how to configure this in a modern version of Firefox. The actual configuration of a SOCKS proxy will vary based...
