updateBannerLabels.uc.js

// ==UserScript==
// @name           Concise Update Banner Labels
// @version        1.2
// @author         aminomancer
// @homepage       https://github.com/aminomancer
// @description    This script simply changes the update banners in the hamburger button app menu to make the strings a bit more concise. Instead of "Update available — download now" it will show "Download Nightly update" for example.
// ==/UserScript==

(function () {
    // wait for {param} milliseconds in async function
    function sleep(ms) {
        return new Promise((resolve) => setTimeout(resolve, ms));
    }

    class UpdateBannerLabelProvider {
        constructor() {}

        get appName() {
            if (!this._appName) {
                this._appName = gBrandBundle.GetStringFromName("brandShorterName");
                let words = this._appName.split(" ");
                if (words.length > 1) this._appName = "Firefox";
            }
            return this._appName;
        }

        get attributes() {
            return (
                this._attributes ||
                (this._attributes = {
                    "update-available": `Download ${this.appName} update`,
                    "update-manual": `Download ${this.appName} update`,
                    "update-downloading": `Downloading ${this.appName} update`,
                    "update-restart": `Restart to update ${this.appName}`,
                    "update-unsupported": `Unable to update: system incompatible`,
                })
            );
        }
    }

    async function init() {
        window.gUpdateBanners = new UpdateBannerLabelProvider();
        PanelUI._initialized || PanelUI.init(shouldSuppressPopupNotifications);
        PanelUI._showBannerItem = function _showBannerItem(notification) {
            if (!this._panelBannerItem) {
                this._panelBannerItem = this.mainView.querySelector(".panel-banner-item");
            }

            let label = gUpdateBanners.attributes[notification.id];
            if (!label) return; // Ignore items we don't know about.

            this._panelBannerItem.setAttribute("notificationid", notification.id);
            this._panelBannerItem.setAttribute("label", label);
            this._panelBannerItem.hidden = false;
            this._panelBannerItem.notification = notification;
        };
    }

    if (gBrowserInit.delayedStartupFinished) {
        init();
    } else {
        let delayedListener = (subject, topic) => {
            if (topic == "browser-delayed-startup-finished" && subject == window) {
                Services.obs.removeObserver(delayedListener, topic);
                init();
            }
        };
        Services.obs.addObserver(delayedListener, "browser-delayed-startup-finished");
    }
})();