veil-client-ff/background.js

/*
    Author: Farooq Karimi Zadeh
    Email: fkz@riseup.net
    Repo: https://notabug.org/farooqkz/veil-client-ff
*/
browser.menus.create({
    id: "veilit",
    title: "Veil it now!",
    contexts: ["image"]
});
browser.menus.create({
    id: "unveilit",
    title: "Unveil it!",
    contexts: ["image"]
});

browser.menus.onClicked.addListener((info, tab) => {
    browser.tabs.sendMessage(tab.id, [info.targetElementId, info.menuItemId], null);
});