Prevent unreachable servers from stalling websites by disabling their scripts for 5 minutes if they previously could not load.
Failed requests can be viewed in the toolbar button, which shows which URLs were blocked and how long the block will last. The toolbar button only appears when scripts are blocked.
Note that this extension does not target anyone and has no black-list or white-list. Blocking only occurs if the server was previously unreachable and therefore the content would not have loaded anyway.
Test the effects of unreachable servers here: http://tinyurl.com/test-blocking-js