Some websites hijack the scrollwheel in order to implement smooth scrolling and other annoying stuff. The following javascript snippet can disable such features.
Create a bookmark, and add the javascript code to the address part of the bookmark. When you stumble upon a hijacking website, you simply click on the bookmark.
You can also use extensions like tampermonkey to automate this process.
Source: https://superuser.com/a/1263145
javascript:(function(){document.getElementsByTagName("body")[0].addEventListener("wheel",function (event) {if (event.target.classList.contains('ace_content')) {return;}event.stopPropagation();}, true);})();
The same code in a more readable form:
javascript: (function() {
document.getElementsByTagName("body")[0].addEventListener("wheel", function(event) {
if (event.target.classList.contains('ace_content')) {
return;
}
event.stopPropagation();
}, true);
})();