Right Click & Copy Enabler

How it works

Sites block right-click and selection in several unrelated ways, so undoing it takes four layers rather than one trick. The script runs at document_start in the page's MAIN world, which is the only place it can see and rewrite the site's own event wiring.

chrome.scripting.registerContentScripts([{
  id: 'rcce-unblock',
  js: ['unblock.js'],
  matches,
  runAt: 'document_start',
  world: 'MAIN',        // needs the page's real globals, not an isolated copy
  allFrames: true,
  persistAcrossSessions: true,
}]);

1. Refuse new blockers

Patching addEventListener stops page-wide handlers from ever attaching. Listeners on a specific element are left alone, so custom menus and editors keep working.

const nativeAdd = EventTarget.prototype.addEventListener;
EventTarget.prototype.addEventListener = function (type, listener, options) {
  if (BLOCKED.has(type) && isGlobalTarget(this)) return;
  return nativeAdd.call(this, type, listener, options);
};

2. Neutralise the ones already attached

Layer 1 only helps if the extension runs first. Patching preventDefault works retroactively, which is what makes turning the extension on mid-page take effect without a reload:

const native = Event.prototype.preventDefault;
Event.prototype.preventDefault = function () {
  if (BLOCKED.has(this.type)) return; // the blocker's call becomes a no-op
  return native.call(this);
};

3. Outrank document-level handlers

Most blockers listen on document. A capture listener on window runs *before* those, because window is the ancestor — so cutting propagation there stops them. Listening on document.body instead, as the first version did, is too late: body is a descendant, and its capture phase runs after document has already handled the event.

for (const type of BLOCKED) {
  nativeAdd.call(window, type, (e) => e.stopPropagation(), true);
}

4. Undo the CSS and the inline attributes

user-select: none, oncontextmenu="return false" and unselectable are all stripped, with a MutationObserver for single-page apps that re-add them after navigation.

Scope

Enabling it everywhere would break legitimate custom context menus, so it is a three-way choice — off, this site, or everywhere — and <all_urls> is requested only if you pick the last one.