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I used to use “Google/Yandex Search Link Fix” but it died along with XUL https://github.com/palant/searchlinkfix

Works fine in practice. I've had it installed for years and didn't even know it's not being maintained anymore until I saw your comment.

There's also "Don't Track Me Google": https://github.com/Rob--W/dont-track-me-google which seems to work pretty well, including on Firefox for Android.