Firefox plugin to block scripts of only specified websites

"NoScript is a common solution. It uses whitelisting by default -- but as Kelbizzle notes, supports blacklisting -- and also helps with vulnerabilities related to XSS.
YesScript is a blacklist-only alternative to the tangled code of NoScript.
AdBlock Plus's filter options can also solve this: google-analytics.com$script. This is my choice because it makes managing and copying filter rules extremely easy.
RequestPolicy allows you to block third-party resources, including script. This is a whitelist with a a few useful temporary or permanent ""allow all"" options, and it doesn't differentiate between type of resource like ABP does.
Karma Blocker is a resource blocker that is apparently as powerful as ABP, but it requires more thought to configure than the other options."

I use Blocksite. It allows the use of wildcards so you can add something like "httpgoogle-analytics.com".