Not as far as I know. This is the first time we've been able to do per-tab throttling. Up until now tools like Fiddler, Charles Proxy or Link Conditioner throttle the entire connection. This now lets us take an entire tab offline (to test ServiceWorker or AppCache) and your other tabs are still good.

afaik Chrome is the first browser to have Network Throttling built in in any capacity. Other browsers require you to use external tools to get anything.

Those tools also are using a chainsaw to cut bread instead of a knife. They attach to the browser as a whole, not the individual page you want.