In @firefoxnightly (not just nightly! ANY #Firefox 141 or higher:
1. Type "about:config" in the address bar
2. Accept the warning (if applicable)
3. Search for "browser.ml.enable"
4. Set it to "false" (double click it)
5. Search for "browser.ml.chat"
6. Set "browser.ml.chat.enable" to false
7. Adjust other values, such as the menu, badges, prompts values
8. Use @FirefoxDevTools the way the flying spaghetti monster intended it, without a stupid #AI
@Sassinake @Firesphere @firefoxnightly @FirefoxDevTools And on IronFox for android. Not all the options just a few
@Sassinake @Firesphere @firefoxnightly @FirefoxDevTools thanks! Came here to check for Librewolf and now I know it also needs the setting.
Edit: librewolf 141.0.3-1 has these settings disabled by default, so no need to act.
@Firesphere There's AI in the dev tools?

@Firesphere @firefoxnightly @FirefoxDevTools Aside from the cringe of ML in my browser, there is the cringe that these two options are named:

browser.ml.chat.enabled

browser.ml.enable

The inconsistency makes me itch.

@Firesphere @firefoxnightly @FirefoxDevTools thanks. Disabled it on Firefox for android as well. Was enabled by default.
@Firesphere @firefoxnightly @FirefoxDevTools I would, Mobile Firefox has disabled about:config :/
@harald @Firesphere @firefoxnightly @FirefoxDevTools Go to chrome://geckoview/content/config.xhtml
And while you are there, you can reset
general.aboutConfig.enable