Which option do I need to disable to get the "new pull request" button back on the main repo page? I have to do PRs from the master branch into staging/production branches after merging feature branches into master. With this great extension installed this button is gone.
I don't have that button with the extension disabled. It doesn't ring a bell as existing to me either. Can you attach a screenshot with the extension on and then disabled? Please disable other extensions as well, as they may be creating/hiding this button.

That's with the plugin disabled. With it enabled, the button "New pull request" simply wouldn't exist. Clicking the button takes you to the diff between branches tool so that you can choose which branches to compare and generate the PR from.
I have no other extensions installed that interact with GitHub.
@yakov116 does that mean there isn't an option in the extension's settings I can toggle to disable that style?
Thanks for the screenshot. I always create my PRs from the branch push popup or the PR page and never noticed the button there.
You're correct in that it's not directly tied to a feature to be disabled, but what yakov116 linked shows you the CSS you can override to enable it again.
This is one of many UI cleanups we do and I can't see us adding a feature to disable it in the future, with it being easily overridden via CSS.
Well this is an unfortunate outcome.
@jsumners commented on Jun 3, 2019, 1:50 PM GMT+2:
Well this is an unfortunate outcome.
Why is this unfortunate? Go to GitHub Refined options, and paste the following in the "Custom CSS" textbox:
/* Show new PR button again. See https://github.com/sindresorhus/refined-github/issues/2107#issuecomment-498236040 */
.file-navigation .new-pull-request-btn {
display: inline-block;
}
Hmm, I didn't know(overlooked?) the extension has a user CSS section. I assumed I'd have to setup some other user CSS extension to do the override and just removed Refined GitHub.