To re-enable the right click (context) menu, it is enough to copy the code, type "javascript:" in the address bar of your browser and then paste the copied code, i.e., javascript:[CODE]

Re-enable-Right-Click-Option-on-Web-Page.js

function enableContextMenu(aggressive = true) {
    void (document.ondragstart = null);
    void (document.onselectstart = null);
    void (document.onclick = null);
    void (document.onmousedown = null);
    void (document.onmouseup = null);
    void (document.body.oncontextmenu = null);
    enableRightClickLight(document);
    if (aggressive) {
        enableRightClick(document);
        removeContextMenuOnAll("body");
        removeContextMenuOnAll("img");
        removeContextMenuOnAll("td");
    }
}
function removeContextMenuOnAll(tagName) {
    var elements = document.getElementsByTagName(tagName);
    for (var i = 0; i < elements.length; i++) {
        enableRightClick(elements[i]);
        enablePointerEvents(elements[i]);
    }
}
function enableRightClickLight(el) {
    el || (el = document);
    el.addEventListener("contextmenu", bringBackDefault, true);
}
function enableRightClick(el) {
    el || (el = document);
    el.addEventListener("contextmenu", bringBackDefault, true);
    el.addEventListener("dragstart", bringBackDefault, true);
    el.addEventListener("selectstart", bringBackDefault, true);
    el.addEventListener("click", bringBackDefault, true);
    el.addEventListener("mousedown", bringBackDefault, true);
    el.addEventListener("mouseup", bringBackDefault, true);
}
function restoreRightClick(el) {
    el || (el = document);
    el.removeEventListener("contextmenu", bringBackDefault, true);
    el.removeEventListener("dragstart", bringBackDefault, true);
    el.removeEventListener("selectstart", bringBackDefault, true);
    el.removeEventListener("click", bringBackDefault, true);
    el.removeEventListener("mousedown", bringBackDefault, true);
    el.removeEventListener("mouseup", bringBackDefault, true);
}
function bringBackDefault(event) {
    event.returnValue = true;
    typeof event.stopPropagation === "function" && event.stopPropagation();
    typeof event.cancelBubble === "function" && event.cancelBubble();
}
function enablePointerEvents(el) {
    if (!el) return;
    el.style.pointerEvents = "auto";
    el.style.webkitTouchCallout = "default";
    el.style.webkitUserSelect = "auto";
    el.style.MozUserSelect = "auto";
    el.style.msUserSelect = "auto";
    el.style.userSelect = "auto";
    enablePointerEvents(el.parentElement);
}
enableContextMenu();