An alternative that works would be "Google search link fix" [1], which is written/maintained by the current developer of Adblock Plus. (There's probably no reason that the core script [2] couldn't be adapted into a userscript for Tampermonkey/Greasemonkey/etc. if he isn't considered trusted.) It does currently have a problem on Firefox for Android where a long-press on a link doesn't trigger the tracking removal. [3]
[1]: https://addons.mozilla.org/en-US/firefox/addon/google-search...
[2]: https://github.com/palant/searchlinkfix/blob/master/data/con...
Unfortunately look's like it's defunct, a bunch of 1-star reviews being left recently. Perhaps worth removing it from the tool if the author is here?