“Remember Greasefire? It was an add-on for the Firefox browser that would alert you whenever userscripts were available for sites that you visited in the browser.
“The extension used userscripts-org as its source, a site that is no longer available. Since it has not been updated since 2012, it is not working either anymore because of this.
“Enter Greasy Scripts, a brand new add-on for Firefox that brings the functionality back to life, albeit in a slightly different form.
Source: gHacks Tech News
Greasy Scripts finds userscripts on sites you visit in Firefox