This extension gets rid of Google's ugly (tracking) URL. This speeds up loading search results and allows you to normally copy links.
Source code: https://github.com/Rob–W/dont-track-me-google
Firefox addon: https://addons.mozilla.org/en-US/firefox/addon/dont-track-me-google1/
Available since 2011.
As of version 4.23 (January 2021), link tracking via the "ping" attribute is disabled by default. This prevents Google from tracking your link clicks. If you want Google to track your link clicks, visit the options page to disable this feature.