Wikipedia.org only has a toggle for "Restore all default settings (in all sections)" meaning not just gadgets. Equivalent of killing my full account settings to tie my tie exactly. I know technology asks a lot, but maybe you can spare me the ordeal of troubleshooting Wikipedia.org so I can focus again.
Please do not suggest MediaWiki.org defaults, our question is specific to Wikipedia.org's feature-set alone.
Can somebody copy/paste their default https://en.wikipedia.org/wiki/Special:Preferences "Gadgets" tab/section checkbox settings? Otherwise if I can get some encouragement to open a second account for testing purposes, I have never done that before and could then answer the question myself (and feel like a "karma ****" …I do not mind being but the asterisked judgement is another story), however I do/did not ever go beyond a second account except for reddit.com, leaves too many questions (telling somebody is then security).
(Question title written as Broken English programmer code like stackexchange.com suggests at the top of my feed, I have heard that called computerese. If I try to talk with my voice there are other questions, so UNIX style.)
Best Answer
You can check at Special:Gadgets - the default ones will have "Enabled for everyone by default". (Or you can just register a new account in an incognito window. It takes about five clicks, not even an email address needed.)