Yes, beta version for sure(just go to about:config), possibly it works on the normal version with the following method (which allows you to insert a user.js)

Instructions: https://github.com/yokoffing/Betterfox/issues/240

Other option is to use another gecko based browser check this https://divestos.org/pages/browsers

Go to chrome://geckoview/content/config.xhtml and set dom.private-attribution.submission.enabled to false.

Firefox 128.0.3 and higher has this globally disabled for Android.

This is equivalent to about:config and works on the regular firefox mobile version too:

chrome://geckoview/content/config.xhtml

Didn't work for me just now. When there have been ways in the past the non-nightly version wipes the changes each restart unless they are already exposed in settings I think.

You have to type it manually and not paste apparently. Mine was already set false so I'm not going to experiment with turning it on.

I just checked this config value on my Firefox Nightly and it's already preset to false. Interesting.

Maybe you had turned it off last time this was on the front-page? https://news.ycombinator.com/item?id=40974112

That's what I suspect for my own setting anyway.