sindresorhus/refined-github

The issue has been closed
Make changes to the merge button temporary #4551
alimpfard posted onGitHub
In my own experience, changing that button to "Squash and merge" (or any other option) is only ever a temporary measure, but github switches to it permanently until you change it back. This has caused a few squashes by mistake so far. I think it'd be a sane default to make changes to that button temporary.